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Home > CCG > Chapter 3 > Lesson 3.1.1 > Problem 3-9

3-9.

Examine each diagram below. Identify the error in each diagram.  

  1. A triangle with a base of 5 meters, left side 3 meters, and right side 9 meters.

    Compare the length of the longest side with the sum of the two shorter sides.

  1. A right triangle with a base of 12 centimeters, height 5 centimeters, and hypotenuse 14 centimeters.

    Test the side lengths with the Pythagorean Theorem.

  1. A triangle, where two sides are labeled, 7, inches with the angle between, labeled 55 degrees. One of the base angles is labeled 65 degrees.

    Since the sum of the interior angles in a triangle is , fill in the measure of the third angle. Considering the given side lengths, does this make sense?

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