Question 840471: Find the area of an isosceles trapozoid with side lengths of 15,40,15 an 22. Units are measured in mm? Answer by LinnW(1048) (Show Source):
You can put this solution on YOUR website! Think of the bottom side being length 40
Think of the bottom being three parts with
lengths 9,22 and 9. On the left side is a triangle with a
base of 9, a hypotenuse of 15 and an unknown height h .
Let's find the length of the third leg of the triangle
which will be the height.
subtract 81 from each side = 12
Now we know that our trapezoid is made up of
a triangle with base 9 and height 12, a rectangle with base 22 and height 12,
and another triangle with base 9 and height 12.
The area of the trapezoid =
