(5 + x) + 0 = 5 + x
What property is this

The Identity Property of Zero

Step-by-step explanation:

If you add 0 to any number, the result will be that number.

Identity of add of addition

Step-by-step explanation:

The sum of 0 and any number is that number

so a parallelogram is just like a square base times height. multiply 40 and 39 to get 1560 inches.

a triangle is base times height divided by two. so multiply 7.9 and 5 and then divide it by 2 to get 19.75inches.

the kite can be split into two separate triangles and added together to get the total area. 30 x 4 /2 which equals 60. make sure to double it for the two triangles making 120.