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Mathematics 20 Online
OpenStudy (izzybeex2):

Quadrilateral OPQR is inscribed inside a circle as shown below. What is the measure of angle P? You must show all work and calc ulations to receive credit.

OpenStudy (mathstudent55):

I can't access your link. Can you draw it or take a pic of your problem and post it?

OpenStudy (izzybeex2):

I tried attaching a picture but I couldn't post it.

OpenStudy (izzybeex2):

OpenStudy (izzybeex2):

Nevermind.

OpenStudy (izzybeex2):

@mathstudent55

OpenStudy (izzybeex2):

@triciaal

OpenStudy (triciaal):

some useful info sum of the angles in a quadrilateral is 360 degrees N is the center of the circle so ON = RN etc for all the points that form the radii

OpenStudy (izzybeex2):

Okay.

OpenStudy (izzybeex2):

So, I still don't understand how I would solve for P.

OpenStudy (izzybeex2):

I know the Inscribed Quadrilateral Theorem The opposite angles of an inscribed quadrilateral to a circle are supplementary.

OpenStudy (izzybeex2):

Which means their sum is 180degrees

OpenStudy (izzybeex2):

But I don't know how to find out P using this information..

OpenStudy (mathstudent55):

In an inscribed quadrilateral, opposite angles are supplementary.

OpenStudy (mathstudent55):

That will give you and equation for x and an equation for y. Then you can solve both equations separately to find x and y.

OpenStudy (mathstudent55):

Since the problem only asks for angle P, then use angle P and the opposite angle to P, angle R. Add their measures and set the sum equal to 180 since angles P and R are supplementary. Than solve for y. Since angle P measures y, the value you get for y is your answer.

OpenStudy (izzybeex2):

I am still a bit confused so would I combine angle P and angle R into an equation to get Y? Like (3y+8) y = 180 degrees? I feel like I am not properly understanding this.

OpenStudy (izzybeex2):

And would my answer be 43?

OpenStudy (triciaal):

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