3. use the description of each triangle to draw a picture of the triangle. write and solve equations to find missing angle measures when necessary. label the measures of all angles of the triangle and mark congruent sides and right angles. (you do not need to draw the triangle exactly to scale.) (a) right isosceles triangle (b) equiangular (all three angles congruent) isosceles triangle (c) acute scalene triangle with two angle measures of 57° and 82°