Illustrative Math Alignment: Grade 6 Unit 1

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

This is part of a collection of math examples that focus on ratios, proportions, and percents.

Topic

Equations

Description

This example demonstrates solving equations using angle properties, specifically focusing on supplementary angles. Supplementary angles are two angles that add up to 180 degrees. In this case, we have one known angle of 135° and an unknown angle x. 

To solve such equations, we use the fundamental property of supplementary angles: their sum equals 180°. 

Topic

Equations

Description

This example illustrates solving equations using angle properties, focusing on parallel lines cut by a transversal and supplementary angles. When parallel lines are cut by a transversal, pairs of supplementary angles are formed, meaning they sum to 180°. 

In this scenario, we have one known angle of 118° and an unknown angle x. However, angle y and the 118° angle are alternate exterior angles, which are congruent. This means we can set up this equation using the property of supplementary angles:

118 + x = 180

Topic

Equations

Description

This example illustrates solving equations using angle properties, focusing on supplementary angles. Supplementary angles are two angles that sum to 180 degrees. In this scenario, we have one known angle of 75° and an unknown angle x. The equation for supplementary angles is always in the form: angle1 + angle2 = 180°. 

Here, we can write 75 + x = 180. To solve for x, we subtract 75 from both sides: x = 180 - 75, giving us x = 105°. 

Topic

Equations

Description

This example demonstrates solving equations using angle properties, specifically focusing on straight angles and vertical angles. A straight angle measures 180°, and vertical angles are always congruent. In this scenario, we have two known angles (36° and 72°) and an unknown angle x. This unknown angle x is vertical (and therefore congruent) to angle z. 

The angles 36, 72, and z form a straight, but since z is congruent to x, we can write the sum of this straight angle:

x + 36 + 72 = 180

x = 72°

Topic

Equations

Description

This example illustrates solving equations using angle properties, focusing on straight angles and vertical angles. A straight angle measures 180°, and vertical angles are always congruent. In this scenario, we have two known angles (42° and 55°) and an unknown angle x. However, angle x is vertical (and therefore congruent) to angle y.

The equation can be set up based on the fact that the sum of angles on a straight line is 180°. Thus, we have: 

42 + 55 + x = 180

Topic

Equations

Description

This example demonstrates solving equations using angle properties, specifically focusing on complementary angles and the exterior angle theorem. Complementary angles are two angles that sum to 90°, while the exterior angle theorem states that an exterior angle of a triangle is equal to the sum of the two non-adjacent interior angles. In this scenario, we have a right angle (90°), an exterior angle (125°), and an unknown angle x. Using the exterior angle theorem, we can set up the equation: x + 90 = 125. To solve for x, we subtract 90 from both sides: x = 35°. 

Topic

Equations

Description

This example illustrates solving equations using angle properties, focusing on an isosceles right triangle. An isosceles right triangle has a right angle (90°) and two equal angles. In this scenario, we have the right angle given, and the two unknown equal angles represented by x. 

The equation can be set up based on the fact that the sum of angles in a triangle is 180°. Thus, we have: 

90 + x + x = 180, or simplified, 90 + 2x = 180

To solve for x, we first subtract 90 from both sides: 2x = 90. Then, dividing both sides by 2, we get: x = 45°. 

Topic

Equations

Description

This example demonstrates solving equations using angle properties, specifically focusing on parallel lines cut by a transversal and same side interior angles. When parallel lines are cut by a transversal, same side interior angles are supplementary, meaning they sum to 180°. 

In this scenario, we have one known angle of 112° and an unknown angle x. The 112° angle is vertical to the same side interior angle paired with x. The equation can be set up as: 

112 + x = 180

Topic

Equations

Description

This example illustrates solving equations using angle properties, focusing on parallel lines cut by a transversal and alternate interior angles. When parallel lines are cut by a transversal, alternate interior angles are congruent, meaning they have the same measure. In this scenario, we have one known angle of 48° and an unknown angle x. Since x and y are alternate interior angles, they are congruent. 

We can now use the property of supplementary angles to solve for x:

x + 48 = 180

x = 132°

Topic

Equations

Description

This example demonstrates solving equations using angle properties, specifically focusing on parallel lines cut by a transversal and alternate interior angles. When parallel lines are cut by a transversal, alternate interior angles are congruent, meaning they have the same measure. 

In this scenario, we have one known angle of 43° and an unknown angle x. However, angle x and angle y are alternate interior angles and are congruent. This means that x and teh 43° angle are same side interior angles, which are supplementary. We set up this equation:

Topic

Equations

Description

This example focuses on solving equations using the properties of similar isosceles triangles. Isosceles triangles are characterized by having two equal sides and two equal base angles. In this case, we have two similar isosceles triangles, which means they share the same shape but may differ in size. The equation to be solved involves finding the unknown angle x, given that one of the angles is 20°. The property of vertical angles tells us that the angle vertical to the 20° angle is also 20°

Topic

Equations

Description

This example, similar to Example 9, involves solving equations using the properties of a kite and applying the exterior angle theorem. We are again given one angle of 40° and two unknown angles, y and x. The goal is to set up and solve equations to find the values of y and x using the properties of kites and the exterior angle theorem. 

Key properties to consider: 

Topic

Equations

Description

This example explores solving equations using the properties of similar isosceles triangles, building upon the concepts introduced in Example 1. In this case, we have two similar isosceles triangles with one known angle of 70° and an unknown angle x. The goal is to determine the value of x using triangle properties and algebraic techniques. 

Topic

Equations

Description

This example focuses on solving equations involving parallel lines cut by a transversal, a fundamental concept in geometry. The problem presents two parallel lines intersected by two transversals that also form a triangle. We are given that one angle measures 120° and the corresponding angle can be expressed as (y + 40)°. The goal is to determine the value of y using the properties of angles formed by parallel lines and a transversal. 

When parallel lines are cut by a transversal, several important angle relationships are formed: 

Topic

Equations

Description

This example demonstrates solving equations using the Exterior Angle Theorem in the context of parallel lines cut by a transversal, two crucial concepts in geometry. The problem presents a triangle with two known interior angles of 80° and y, and an unknown exterior angle x°. 

We are also given that 80 - y = 50, which simplifies to y = 30. The goal is to determine the value of x using the properties of triangles and the Exterior Angle Theorem. The Exterior Angle Theorem states that an exterior angle of a triangle is equal to the sum of the two non-adjacent interior angles. Wo we get x = 80 + 30, or x = 110.