I know that x= 60. I don't know what a proportion is. sorry.
The formula of an area of a rhombus:
The diagonals bisect each other. That is, they divide each other into two equal parts.
Therefore we have:
Substitute:
Answer: 2.16 m²
Find the greates number we can divide them evenly by
that is also called the greatest common factor
so
factor each
20=2*2*5
100=2*2*5*5
common gropu is 2*2*5=20
20 groups can be made
each group can have 5 cookies and 1 brownie
Answer:
(x,y)(0.4x, 0.4y) is the answer for your question