The base of an isosceles triangle is 21 centimeters long. the altitude to the base is 9 centimeters long. what is the approximate measure of a base angle of the triangle?

The art class is planning to paint a mural on an outside wall. this figure is a scale drawing of the wall. width: 11 in length: 28 in unit rate: 1.5 ft per in. write the ratio of the area of the drawing to the area of the actual mural. write your answer as a unit rate. show that this unit rate is equal to the square of the unit rate 1.5 ft per in