Math Example--Polygons--Triangle Classification: Example 18
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Geometry >> Triangles >> Definition of a Triangle

Math Example--Polygons--Triangle Classification: Example 18

Math Example--Polygons--Triangle Classification: Example 18

A right triangle with angles of 50°, 40°, and an unknown angle x.

Topic

Triangles

Description

This example shows a triangle with two angles labeled 50° and 40° and an unknown angle x. Solving for x, we find it to be 90°, which classifies this as a right triangle.

Triangles are classified by side lengths or angles, and a right triangle has a 90° angle. Examining examples like this helps students reinforce the criteria for identifying right triangles based on their angle properties.

Seeing multiple worked-out examples enables students to apply classification rules more effectively and confidently.

Teacher's Script: "By solving for the unknown angle, we find a 90° angle, so this triangle is classified as a right triangle. Observing angle measures helps us make the correct classification."

For a complete collection of math examples related to Triangles, click on this link: Math Examples: Triangle Classification Collection.

Common Core Standards CCSS.MATH.CONTENT.7.G.A.2, CCSS.MATH.CONTENT.4.G.A.2, CCSS.MATH.CONTENT.5.G.B.3
Grade Range 4 - 7
Curriculum Nodes Geometry
    • Triangles
        • Definition of a Triangle
Copyright Year 2013
Keywords triangles, classification