What is the value of a? Help!!

Question

anonymous · Answer

attachment

tkhunny · Answer

How far have you gotten?

anonymous · Answer

Uhm not far. I know that this involves the corollaries of inscribed angles or whatever, im just not exactly sure what the process is to finding a.

tkhunny · Answer

Very good.  That IS pretty far.

Sum of Interior Angles of a quadrilateral is...?

anonymous · Answer

Would it be 360?

tkhunny · Answer

Yes.  So 100 + 96 + c + d = 360

That's a start.  Now what?

anonymous · Answer

c is equal to 84 and d is equal to 80

tkhunny · Answer

Why?

anonymous · Answer

uhm i think its cause they're supplementary angles or something

anonymous · Answer

@freckles  could you help me with this? this is literally the last question i have to do today lol

tkhunny · Answer

Yes, they are supplementary in pairs.  You have it just right.

We need more information. The measure of an inscribed angle is 1/2 the arc it intersects. This gives more information.