Understanding Triangles and Angles

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

• 90 degrees

• 180 degrees

• 270 degrees

• 360 degrees

If one angle of a triangle is 90 degrees, what type of triangle is it?

• Acute triangle

• Right triangle

• Obtuse triangle

• Equilateral triangle

Two angles are complementary. If one angle is 35 degrees, what is the measure of the other angle?

• 45 degrees

• 55 degrees

• 65 degrees

• 75 degrees

Two angles are supplementary. If one angle is 110 degrees, what is the measure of the other angle?

• 60 degrees

• 70 degrees

• 80 degrees

• 90 degrees

• 90 degrees

• 45 degrees

• 39 degrees

• 51 degrees

If two angles of a triangle are 45 degrees and 45 degrees, what is the measure of the third angle?

• 45 degrees

• 60 degrees

• 90 degrees

• 120 degrees

Which of the following pairs of angles are complementary?

• 30 degrees and 60 degrees

• 45 degrees and 45 degrees

• 50 degrees and 40 degrees

• 70 degrees and 20 degrees

Which of the following pairs of angles are supplementary?

• 30 degrees and 60 degrees

• 45 degrees and 45 degrees

• 50 degrees and 130 degrees

• 70 degrees and 110 degrees

Find the value of a.

• 46 degrees

• 44 degrees

• 64 degrees

• 180 degrees

In a right triangle, if one of the angles is 30 degrees, what is the measure of the other non-right angle?

• 30 degrees

• 45 degrees

• 60 degrees

• 90 degrees