Triangle	Angle A	Angle B	Angle C	A + B + C
a.
b.
c.
d.

Drag the protractor to the vertex of a triangle.

Click to toggle on and off the ability to rotate the protractor.

Grab the protractor at the 90º mark and drag to rotate.

Insert the cursor in the input fields to enter the angle measure.

Click to remove the table and return the protractor to the bottom of the mat.