What is the measure of any exterior angle of an equiangular triangle? what is the sum of the exterior
angle measures?
.
the measure of any exterior angle of an equiangular triangle is
the sum of the exterior angles is

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

Qrst is a parallelogram. determine the measure of ∠q pls