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Math Example--Area and Perimeter--Triangles: Example 4

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# Math Example--Area and Perimeter--Triangles: Example 4

## Topic

Geometry

## Description

This example introduces students to calculating the area of an acute triangle using algebraic expressions. The triangle has angles of 50 and 60 degrees, with the base labeled as x and the height as x - 4. Students are tasked with expressing the area formula using these variables.

Understanding how to calculate triangle areas using algebraic expressions is a crucial skill in geometry. This collection of examples helps teach this topic by bridging the gap between concrete numerical values and abstract variables. Students learn to apply the area formula flexibly, preparing them for more advanced mathematical concepts.

Exposure to multiple worked-out examples is essential for students to fully comprehend the relationship between algebra and geometry. Each example builds upon previous knowledge, gradually increasing in complexity. This approach helps students develop critical thinking skills and the ability to generalize mathematical concepts.

Teacher Script: "Now, let's look at a triangle where we're using algebraic expressions for its dimensions. Notice how the base is labeled x and the height is x - 4. How can we use these expressions in our area formula? Remember, we're still using A = 1/2 × base × height, but now we're substituting these algebraic expressions. Can someone walk us through how to set up this equation?"

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 |