Question

find the measure of angle CDE.
a.50
b.65
c.115
d.130

Answer 1

is it d?

Answer 2

a.

2x - 15 = x +50
x = 32.5
so angle CDE = 2x - 15 = 50.

Answer 3

first expression is put as per exterior angles theorem

Answer 4

it's c

Answer 5

how is it c?

Answer 6

2x - 15 = x +50
2x - 15+15 = x +50+15
2x = x +65

2x-x = x -x +65
x = 65

Ok we found x but we want angle CDE

CDE = 2x - 15

Plug in back 65

2(65) - 15= 130-15= 115

Answer 7

agree with Romero.. .

Answer 8

okay