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Math Example--Solving Equations--Solving Equations Using Angle Properties: Example 3

Solving Equations Using Angle Properties: Example 3

Example 3: Straight angles and vertical angles

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°

This method of solving angle equations relies on understanding multiple geometric properties and applying algebraic techniques. It's crucial to recognize various angle relationships in geometry, such as straight angles and vertical angles. By identifying these relationships, we can formulate complex equations and solve for unknown angles. This process not only reinforces geometric concepts but also strengthens algebraic problem-solving skills, particularly in handling equations with multiple instances of the unknown variable.

For a complete collection of math examples related to Equations Using Angle Properties click on this link: Math Examples: Equations Using Angle Properties Collection.

Common Core Standards CCSS.MATH.CONTENT.HSG.CO.C.10, CCSS.MATH.CONTENT.HSA.CED.A.1
Grade Range 9 - 11
Curriculum Nodes Algebra
    • Expressions, Equations, and Inequalities
        • Applications of Equations and Inequalities
Geometry
    • Angles and Planes
        • Definition of an Angle
Copyright Year 2022
Keywords angles, solving equations