Question

Quadrilateral ABCD with vertices A(4, 3), B(4, -2), C(-4, -2) and D(-4, 3) is a rectangle, find the length of the diagonals.
A. square root of 89
B. 5
C. 8
D. square root of 39

Answer 1

your attempt?

Answer 2

Hint: the length of AC , and BD

Answer 3

8?

Answer 4

I need proof, how to get that number.

Answer 5

I didn't say it is right or wrong

Answer 6

i lost my notes so i cant remember

Answer 7

use the distant formula to find the length of AC and BD

Answer 8

http://www.purplemath.com/modules/distform.htm

Answer 9

read and perform, WE, any of us, can check.

Answer 10

B