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Draw right, acute, and obtuse angles


Drag the vertex of the angle to place the vertex at point start text, A, end text.
Drag another point on the angle to make one of the rays go through point start text, B, end text.
Make the other ray go through one of the unlabeled black points to create an acute angle.
The arc symbol near the vertex indicates the angle being measured.
This is an acute angle because its measure is
90, degrees.