I think its sin(72)=0.9511
P = 2(W + L)
P = 60
L = 2W
These are the correct ones:
60 = 2(W + 2W) or W + 2W + W + 2W = 60 or 2*W + 2*2W = 60
so the one that does not work is the last one : W + 2w = 60 <==
Answer:
41 Units
Step-by-step explanation:
You have to use Pitagora.
Diagonal (d) = √9²+40² = √1681 = 41
For this problem, I'd use cross-multiplication.
9/12 = x/8.
When cross multiplying, multiply 12*x and 9*8. This leads to a new equation:
12x = 72.
Then you solve as an algebra problem.
*Divide 12 on both sides*
x = 6.