Interior and Exterior Angles of Triangles

What is an angle whose measure is exactly 90 degrees?

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

Which set of angles can form a triangle: 45°, 65°, 70° or 150°, 110°, 100°?

What type of angle measures less than 90 degrees?

What type of angle measures more than 90 degrees but less than 180 degrees?

What is the term for angles that are opposite each other when two lines cross?

If two angles are complementary, what is the sum of their measures?

If two angles are supplementary, what is the sum of their measures?

What is the measure of each angle in an equilateral triangle?

What is the relationship between the exterior angle and the two opposite interior angles of a triangle?