Question

find x question number 10 both figures​ chapter quadilatterals

Answer 1

Answer:

In first fig,

x=180-80 (linear pair)

=100°

y=180-40

=140°

<ACE+<ABC=100°

<ACE=100-40

=60°

z=180-60

=120°

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Answer 2

Answer:

Step-by-step explanation:

in the first question,we know that the angle of a straight line is 180

so 80+x=180

x=180-80=100

in the second question,40+one interior side of the pentagon=180(sum of angles in a straight line is 180,same as before)

one interior side of polygon=180-40=140

other interior side of polygon+50=180(same reason)

other interior side of polygon=180-50=130

so, we know that the sum of the interior angles in a pentagon is 540

so 140+130+x+x+x=540

3x=540-270

3x=270

x=90

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