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Math Example--Area and Perimeter--Triangles: Example 38

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# Math Example--Area and Perimeter--Triangles: Example 38

## Topic

Geometry

## Description

This example combines the concept of right triangle perimeter with algebraic expressions. The triangle has sides labeled as 3(x + 4) and 4(x + 4). Students are challenged to use the Pythagorean Theorem to find the hypotenuse and then express the perimeter using algebraic terms.

Integrating algebra into geometric problems involving right triangles is a key skill in advanced mathematics. This collection of examples helps teach this topic by demonstrating how algebraic expressions can represent dimensions in right triangles. Students learn to manipulate these expressions within the Pythagorean Theorem and perimeter formula, deepening their understanding of both algebra and geometry.

Exposure to multiple worked-out examples is vital for students to fully grasp the interplay between algebraic expressions and geometric concepts in right triangles. Each example builds on previous knowledge, gradually increasing in complexity. This approach helps students develop problem-solving skills and recognize patterns in mathematical relationships involving variables.

Teacher Script: "Now we're looking at a right triangle where the sides are represented by algebraic expressions. How does this change our approach to finding the hypotenuse and perimeter? Remember, we're still using the Pythagorean Theorem, but now we're working with expressions instead of specific numbers. Can someone suggest how we might start this process and express the perimeter in terms of x?"

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 |
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Grade Range | 6 - 12 |

Curriculum Nodes |
Geometry• Triangles• Area and Perimeter of Triangles |

Copyright Year | 2013 |

Keywords | area, perimeter, triangle |