The area of an isosceles trapezoid with sides of length 5 and bases of length 7 and 13 is?  Pick one:
A) 40	B) 41	C) 42	D) 43	E) 44
Isosceles trapezoid indicates that if we draw perpendicular from two vertex of the smaller side, the longer side with side 13 will be divided into 3 parts= 7, 3 and 3 (Making one square and two right triangles)   For the right triangle, height will be= (5^2-3^2)^1/2= 4   40nd the area of trapezoid = 1/2 (B1+B2)H= 1/2*20*4= 
<gadget id="calculator">1/2*20*4</gadget>
<output>40</output>
40   40
<result>A</result>
The area of an isosceles trapezoid with sides of length 5 and bases of length 7 and 13 is?