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Mathematics 7 Online
OpenStudy (anonymous):

What is the value of d?

OpenStudy (anonymous):

OpenStudy (anonymous):

A) 84 B) 50 C) 80 D) 100

Directrix (directrix):

Theorem: If a quadrilateral is inscribed in a circle, then the opposite angles of the quadrilateral are supplementary.

OpenStudy (anonymous):

@Directrix So is it 100 ?

Directrix (directrix):

No because 100 + 100 = 200. Supplementary angles sum to 180. Try again.

Directrix (directrix):

What do you add to 100 to get 180?

OpenStudy (anonymous):

Oh so it's 80?? because 80 + 100 = 180 ?

Directrix (directrix):

Correct.

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