Question

Can someone help me find the value of b? Geometry help

Answer 1

What is the value of b? you may assume that the ray is tangent to the circle

Answer 2

When the tangent line meets the circle at that point, what angle does it make with the diameter?

Answer 3

what do you mean?

Answer 4

Well.. uhm a semicircle is 180 so uhmm ... ya. Would that angle be 90?...

Answer 5

A better way to think about is you know that the tangent line would be perpendicular to the diameter. But yes, it is 90-degrees.

Answer 6

You can get a using the theorem I taught you earlier.

Answer 7

WIth that, you can get b.

Answer 8

Could you remind again what that theorem was? Would I subract 54 from 90? Sorry usually im not this blonde about these kinds of things lol

Answer 9

a would be equal half of the 54-degree.

Answer 10

Remember? Half of the angle outside, for as long as the conditions are like the ones above.

Answer 11

so 27?

Answer 12

Yes.

Answer 13

a=27. What do you know about a+b?

Answer 14

Thank you so much dude, you're a lifesaver. I may or may not need help with a couple other questions. Wouldnt a + b = 90 in this particular question?

Answer 15

Yep!

Answer 16

so 90 - 27 = the length of b which would be 63?

Answer 17

I'd advise you the revise your circle theorems. :) If you have a good grasp of them, these problems would be easy.

Answer 18

And yes.

Answer 19

Awesome! thank you!

Answer 20

Hey so will you check my answer for this next one? I got 68 @mortonsalt

Answer 21

or would it be 54?