Math Problem Statement

Which statement describes this triangle?

Solution

From the image, we see a triangle with:

  • Two angles labeled 42.542.5^\circ, which makes the third angle also 42.542.5^\circ since the sum of angles in a triangle is 180180^\circ.
  • Two sides of 3.8in3.8 \, \text{in}, which means the triangle is isosceles because two of its sides are of equal length.

The correct statement that describes this triangle is:

"It is an isosceles triangle because two of the sides are the same length."

Would you like a breakdown of why other options are incorrect? Let me know!

Here are five related questions to deepen understanding:

  1. What are the key properties of an isosceles triangle?
  2. How do you calculate the third angle of a triangle when two angles are known?
  3. What distinguishes acute, right, and obtuse triangles?
  4. Can a triangle be both isosceles and right? Why or why not?
  5. How do we use the Pythagorean theorem to verify if a triangle is a right triangle?

Tip: Always verify a triangle’s angles sum to 180180^\circ to ensure its classification is correct.

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Math Problem Analysis

Mathematical Concepts

Triangles
Isosceles Triangles
Angles and Sides

Formulas

Sum of angles in a triangle: A + B + C = 180°

Theorems

Isosceles Triangle Theorem: Two equal angles imply two equal sides

Suitable Grade Level

Grades 6-8