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The measure of the angle of a quadrilate...

The measure of the angle of a quadrilateral are `40^(@), 80^(@) and 100^(@)`. Find the measure of the fourth angle.
The following steps are involved in solving the above problem. Arrange them in sequential order.
(A) `x^(@)=360^(@)-220^(@)`
(B) Let the measure of the fourth angle be `x^(@)`.
(C ) `:.` The fourth angle, x is `140^(@)`.
(D) `40^(@)+80^(@)+100^(@)+x^(@)=360^(@)`

A

ABDC

B

ABCD

C

BADC

D

BDAC

Text Solution

Verified by Experts

The correct Answer is:
D
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