In the derivation of the formula for the volume of a cone, the volume of the cone is calculated to be pi/4 times the volume of the pyramid that it fits inside. Which statement best describes where the pi/4 comes from in the formula derivation?

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

Question 14 (1 point) larry deposits $15 a week into a savings account. his balance in his savings account grows by a constant percent rate.

He trapezoid is composed of a rectangle and two triangles. what is the area of the rectangle? what is the total area of the triangles? what is the area of the trapezoid? ? a) 42 cm2; 27 cm2; 69 cm 2 b) 54 cm2; 27 cm2; 81 cm 2 c) 108 cm2; 27 cm2; 135 cm 2 d) 108 cm2; 13.5 cm2; 121.5 cm 2