Question

5. CD has an endpoint at (2, -1) and a midpoint at (8,3). Which measure is closest to the length of CD?

A 20.4 units
B 8.9 units
C 14.4 units
D 11.7 units​

Answer 1

Answer: C

Explanation:

the equation for X is

`(2+x)/(2) =(8)/(1)` use proportion to solve

2 + x = 16

x = 14

(14,y)

The equation for Y is

`(-1+y)/(2) =(3)/(1)` use proportion to solve

-1 + y = 6

y = 7

(14,7)

now use the distance formula

(14,7) (2,-1)

which gets you 14.4 or C