MathGrade 6-8

Angles and Triangles Answer Key

Q: What are supplementary angles?

Two angles that add up to 180°.

Q: What's an equilateral triangle?

All three sides equal, all three angles are 60°.

Q: What's an isosceles triangle?

Two equal sides and two equal base angles.

Classify angles and triangles and use angle relationships to solve problems.

Looking for Angles and Triangles answers? This complete answer key provides verified solutions for all student exploration activities and assessment questions in the ExploreLearning Angles and Triangles Gizmo.

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Types of Angles

Q1.What's an acute angle?

Answer

Less than 90°.

Q2.What's an obtuse angle?

Answer

Between 90° and 180°.

Q3.What are complementary angles?

Answer

Two angles that add up to 90°.

Q4.What are supplementary angles?

Triangles

Q5.What do the angles of any triangle add up to?

Q6.What's an equilateral triangle?

Q7.What's an isosceles triangle?

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