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What figure is formed by two non-collinear rays that have common endpoint?
Which of the following are the lines that do not intersect?
What is the sum of two supplementary angles?
What angles have common sides but no common interior points?
What is the pair of non-adjacent angles that has common vertex and are formed by two intersecting lines?
Which of the following is formed by two adjacent angles which noncommon sides form opposite rays?
Which of the following illustrates perpendicular lines?

What is m ∠a?

What is m ∠b?

What is m ∠c?
