Question

how do I find R here?

Answer 1

too dark

Answer 2

If angle SWT = 70
then arc ST = 70
http://regentsprep.org/regents/math/geometry/GP15/CircleAngles.htm
then angle R = 70/2 =

Answer 3

oh, I see. thanks :DD

Answer 4

@stupidinmath On Part B 1, the measure of arc ST is shown as 140.
That is not correct. The measure of arc ST is the same as its central angle measure of 70.

Answer 5

oh yeah, changed that. :)

Answer 6

is #3 correct?

Answer 7

yep :)

Answer 8

thanks! :>

Answer 9

Yes, but #4 is not.
You have two theorems confused.

Answer 10

The central angle's arc is the same as the central angle; not twice.

Answer 11

hmm yeah, I mixed it up .__. so, its also 110?

Answer 12

yep :)

Answer 13

oh, understood. thanks guys. again x)

Answer 14

glad we could help! :3

Answer 15

@stupidinmath It is the inscribed angle that has measure half the intercepted arc.

Answer 16

in #5.. its a right angle so.. 90-35= 55 right?

Answer 17

I mean #6

Answer 18

No. It is number 6 that is the right angle. It is an inscribed angle that cuts off a semi-circle so it is 90.

Answer 19

got it. :)

Answer 20

What did you get for 5 --> angle RTS?

Answer 21

55 :)

Answer 22

Yes, I am attaching a summary of the problem.

Answer 23

oh, yeah, that's clear :)

Answer 24

Okay.