Answer:
Area of triangle= Half of perpendicular times base
In short:1/2×p×b
Answer:

Step By Step Explanation:
Simplify 

Rewrite Equation

Simplify 

Answer:
y=3
Step-by-step explanation:
36x2(for the total amount of yarn for the width) would be 72. 112-72=40. Since it is a rectangle and the width should both be the same size, the length should be 20 inches. (20+20+36+36=112, so 20 inches is the correct answer.
the answer would be A.) C+15