90 degrees.
A rectangle is a four-sided figure with two pairs of parallel sides and four right angles.
Each angle of a rectangle measures 90 degrees.
A right angle - whether or not in a rectangle - is 90 degrees.
90
A rectangle has 4 equal right angles of 90 degrees.
Normally 4 sides as in a square or a rectangle
90 degrees inside each of the four corners. Total is 360 degrees, as you might expect. "Rect" means "right"; so rectangle means right angle, which means 90 degrees.
A rectangle has four corners, each of which is 90 degrees. 4 * 90 degrees = 360 degrees
If it is a regular 8 sided octagon then each exterior angle is 45 degrees and each interior angle is 135 degrees.
Each angle for a regular nonagon is 140 degrees each.
135 degrees
360 degrees--90 for each corner
Each interior angle of a regular 6 sided hexagon is 120 degrees.