The PERIMETER of isosceles trapezoid ABCD is equal to 80cm. The length of the line AB is 4 times bigger than lenght of a CD line which is 2/5 the lenght of the line BC (or the lines which are the same in lenght). What is the area of the trapezoid?
I'm sorry for the grammar mistakes etc.
Thanks!
I'm sorry for the grammar mistakes etc.
Thanks!
1 Answer
Dec 18, 2016
Area of trapezium is
Explanation:
Let the trapezium be as shown below:
Here, if we assume smaller side
As such
Hence perimeter is
But perimeter is
Now, we draw perpendiculars fron
hypotenuse is
and hence its height is
and hence as area of trapezium is