Please help, I did portion a but don't know how to do portion b c and d. please explain how to do it and I'll give brainliest thank you! <3 C; how will you find coordinates of the midpoint of each side?

D; how will you determine whether DEFG is a rhombus?​

11 feet 6 inches and 8 feet 6 inches

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column

180-142=38 for the acute angle next to the entry

90+38=128

180-128=52

a=52

step-by-step explanation: