Triangle Theorem and Inequality Quiz

Which of the following sets of side lengths does NOT satisfy the triangle inequality theorem?

• 3, 4, 5

• 5, 12, 13

• 8, 15, 22

• 1, 2, 3

If two angles in a triangle measure 45° and 55°, what is the measure of the third angle?

• 70°

• 80°

• 90°

• 100°

Which of the following is a possible set of side lengths for a triangle?

• 2, 2, 4

• 5, 5, 10

• 7, 10, 5

• 9, 4, 3

What is the sum of the interior angles of any triangle?

• 90°

• 180°

• 270°

• 360°

If one angle in a triangle measures 90° and another measures 30°, what is the measure of the third angle?

• 30°

• 60°

• 90°

• 120°

Which set of side lengths violates the triangle inequality theorem?

• 6, 8, 14

• 7, 24, 25

• 3, 4, 5

• 10, 6, 5

If a triangle has sides of lengths 5, 12, and 13, what type of triangle is it?

• Equilateral

• Isosceles

• Scalene

• Right

A triangle has angles measuring 50° and 60°. What is the measure of the third angle?

• 60°

• 70°

• 80°

• 90°

Which of the following sets of numbers can form a triangle?

• 1, 1, 2

• 4, 4, 7

• 5, 5, 5

• 8, 15, 24

What is the sum of the interior angles of a triangle, in degrees?

• 90

• 180

• 270

• 360