Express in simplest form the area of a trapezoid whose bases are 11 and 28 and whose height is represented is represented by 4y. Express in simplest form the area of a trapezoid whose bases are 11 and 28 and whose height is represented is represented by 4y. @Mathematics

Question

pokemon23 · Answer

TranceNova how do you look for how many exp you have?

pokemon23 · Answer

thanks maiden for helping me

anonymous · Answer

|dw:1321508036811:dw|

What we have in the picture is 2 triangles and a rectangle. We know the area of a triangle is 1/2*b*h and the area of a rectangle is l*h.

The length of the rectangle is 11. The base of both triangles can be solved using this equation:

2x + 11 = 28, where x is the base of the triangle.
2x = 17
x = 17/2

So the area of the trapezoid is 2*1/2b*h + l*h

A = 17*4y/2 + 11*4y = 34y + 44y = 78y

A = 78y