If a 12 sided regular polygon rotates about its center, at which angle of rotation will the image of the polygon coincide with the preimage?

Ateacher has $80 to buy workbooks. each work book cost $3. if she buys as many workbooks as possible, how much money does she have leftover? a) $2 b) $4 c) $6 d) $8

Antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.