Let's see. What is a right isosceles triangle?
A right isosceles triangle is a triangle with one right angle with at least two equal sides. In this case, it would have to be ONLY two because it has a right triangle.
What is the formula for the area of an isosceles triangle?
When y = the identical side lengths of the triangle,
and A = area,
(y × y) ÷ 2 = A
Note: Remember to compute from left to right! :)
We divide by two because when you multiple the two identical sides, you would get a square. However, we're trying to find the right isosceles triangle, and we divide by two.
Now, we can plug-in our values!
(y × y) ÷ 2 = 128
(y × y) = 64
Now, we square root both sides!
y = √64
y = 8
The length of the identical sides of the triangle is 8 meters.
Can I have more explanation please? :)
we know that

in this problem
a pound of coffee beans yields
cups of coffee
so
by proportion
Find the kg of coffee that are required to produce
cups of coffee

therefore
<u>the answer is</u>

(2w-8)+2L because there are 2 sides for the width 2*4=8 so 2w -8 plus 2L