Question

Did I get this right?

Answer 1

Quadrilateral OPQR is inscribed inside a circle as shown below. What equation would be needed to solve for angle R? What is the measure of angle R? You must show all work and calculations to receive credit.

y+(3y+8)=180
y+3y+8=180
4y+8=180
(-8)
4y=172
/4 /4
y=43

angle r=3
angle r=3y+8
angle r=137

Answer 2

What makes you say the opposite angles in the quad add upto 180

Answer 3

http://www.geom.uiuc.edu/~dwiggins/conj47.html

Answer 4

pretty cool :) such a simple proof

Answer 5

so it's correct? or do i need to revise? :)

Answer 6

its probably right, you can check if its right yourself, sub the r back into the equation and both angles will add upto 180

Answer 7

k, thank you.

Answer 8

y+(3y+8)=180
43+(3(43)+8)=4*43+8=160+12+8=180