What is the greatest common factor of 30 and 75?

15. Why? Because 30 = 15 x 2 and 75 = 15 x 5; 2 and 5 have no common factors, which means that 15 is the largest number which goes evenly into both numbers - we can't "pull" any more common factors out from 2 and 5.

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.