Question 1136402
This trapezoid is composed of rectangle dimensions 9 and y; and right triangle of hypotenuse 15 and one leg 9, other leg y.  The height of trapezoid is y.


{{{y^2+9^2=15^2}}}
-
{{{y^2=225-81}}}
{{{y^2=144}}}
{{{y=12}}}



AREA:
{{{((9+18)/2)*12}}}


{{{highlight(162)}}}{{{cm^2}}}