1.08 Day 2 Triangle Angle-Sum Theorem
Click the checkboxes to show the parallel lines, transversals, and angle measures.
Why are the measures of the two angles labeled Angle A (in pink) equal?
They are vertical angles.
They are linear pairs.
They are corresponding angles.
They are alternate interior angles.
Why are the measures of the two angles labeled Angle B (in blue) equal?
They are alternate interior angles.
They are vertical angles.
They are corresponding angles.
They are linear pairs.
What must be the sum of the measures of angles A, B, and C? Why?
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