Question

ABCD is a parallelogram. Angle A is equal to (4x+5)^degrees and angle D is equal to (x-20)^degrees Find x.

Answer 1

33

39

-8.33

65

Answer 2

Hint: alternate interior angles

Answer 3

would it be a?

Answer 4

Could you show how you got that?

Answer 5

honestly it was just a guess

Answer 6

@hartnn ?

Answer 7

interior angles are complementary.,hence their sum=90
so 4x+5+x-20=90
can u solve this to get x??

Answer 8

90-15?

Answer 9

@hartnn ??

Answer 10

since,u had 5x-15=90
you will not subtract,15
u will add 15 to both sides...

Answer 11

is it d?

Answer 12

is this also guess?

Answer 13

do i add 15 to 4x??

Answer 14

5x-15=90
adding 15 to both sides,will give
5x=90+15=105
so x=105/5=??

Answer 15

21

Answer 16

thats not a answer choice

Answer 17

@hartnn

Answer 18

oh,ok.it should be 180
5x=180+15
5x=195
x=195/5=39
is 39 an option??

Answer 19

yes thats b..i posted the choices up top

Answer 20

oh,ok
sorry for the mistake
interior angles are supplementary.,hence their sum=180
so 4x+5+x-20=180.............

Answer 21

so 39 is indeed correct?..

Answer 22

yup :)

Answer 23

thanks! :)

Answer 24

welcome :)