enigma123 wrote:
The height of isosceles trapezoid ABDC is 12 units. The length of diagonal AD is 15 units. What is the area of trapezoid ABDC?
(A) 72
(B) 90
(C) 96
(D) 108
(E) 180
(A) 72
(B) 90
(C) 96
(D) 108
(E) 180
Another approach....Imagine this as the one attached below and then find the area of rectangle.
12*9 = 108
Attachment:
Symmetry.jpg