Question

Abcdefgh is a regular octagon. The minimum degree of rotation by which this octagon can map onto itself is blank . It will take blank increments of that degree of clockwise rotation for a (the image of a) to coincide with c

Answer 1

start by sketching regular octagon abcdefgh (should look like a stop sign, basically) and label the vertices in order.

for a regular polygon, the degree of rotation by which a shape will map onto itself is (360/number of sides)

now, to go from point a to b, you have to rotate from a to b, then from b to c. how many increments is that?