Answer:
The trapezoid
Step-by-step explanation:
All the other shapes have equal angels the trapezoid has only one pair of parallel side.
Answer:
I looked it up and it said #3 is an integer #4 is a negitive integer
Step-by-step explanation:
This is a right triangle (you can confirm by using Pythagorean Theorem: 15² + 36² = 39²)
A = 
A = 
= 15 * 18
= 270
Answer: 270 cm²