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Math Example--Area and Perimeter--Triangles: Example 19

Math Example--Area and Perimeter--Triangles: Example 19

A right triangle with sides labeled as 12, 5, and hypotenuse 13. The solution uses the base and height to calculate the area.

Topic

Geometry

Description

This example focuses on calculating the area of a right triangle with sides 5, 12, and 13 units. Students are guided through applying the area formula to this specific case, which involves a right triangle with integer side lengths that satisfy the Pythagorean theorem.

Right triangles with integer side lengths that satisfy the Pythagorean theorem are important in geometry. This collection of examples helps teach this topic by illustrating how to apply the area formula to such triangles. Students learn to recognize these special right triangles and use their properties to calculate areas efficiently.

Providing multiple worked-out examples is crucial for students to fully comprehend the concept of triangle area, especially with various right triangle configurations. Each example reinforces the application of the area formula while introducing slight variations, helping students recognize patterns and develop problem-solving strategies.

Teacher Script: "Let's examine this right triangle. Notice its side lengths: 5, 12, and 13. Can anyone tell me why these numbers are special? That's right, they satisfy the Pythagorean theorem! Now, how can we use these side lengths to find the area? Remember, in a right triangle, we can use the two shorter sides as our base and height. Can someone walk us through the calculation?"

For a complete collection of math examples related to Area and Perimeter click on this link: Math Examples: Triangular Area and Perimeter Collection.

Common Core Standards CCSS.MATH.CONTENT.6.G.A.1, CCSS.MATH.CONTENT.7.G.B.6, CCSS.MATH.CONTENT.3.MD.D.8, CCSS.MATH.CONTENT.4.MD.A.3, CCSS.MATH.CONTENT.3.MD.C.7, CCSS.MATH.CONTENT.3.MD.C.7.A, CCSS.MATH.CONTENT.3.MD.C.7.B, CCSS.MATH.CONTENT.3.MD.C.7.C, CCSS.MATH.CONTENT.3.MD.C.7.D, CCSS.MATH.CONTENT.3.MD.C.5
Grade Range 6 - 12
Curriculum Nodes Geometry
    • Triangles
        • Area and Perimeter of Triangles
Copyright Year 2013
Keywords area, perimeter, triangle