Question

In the diagram, the circles are concentric.
What is a formula you could use to find the value of c in terms of a and b?
How can you use the inscribed angle to find the value of c?
What is the relationship of the inscribed angle to a and b?

Answer 1

Does a , b , c represent the length of arc ?

Answer 2

im assuming so

Answer 3

"How can you use the inscribed angle to find the value of c?"
This one is pretty straight forward.

What's the relation b/w the angle subtended by an arc at the centre and at the circumference ?

Answer 4

im really confused on this entirely.......

Answer 5

Have you studied this ^^ theorem ?

Answer 6

um maybe i think

Answer 7

So can you answer this -
"How can you use the inscribed angle to find the value of c?"

Answer 8

it is twice the value of the inscribed angle

Answer 9

c is the length of arc. So you'll also need the radius of the external circle in the expression.

Answer 10

that is where i get lost

Answer 11

Do you have the answers ?

Answer 12

no

Answer 13

As the question is silent about the radii ; I'll assert that a , b , c are angles (and hence the degree symbol)

Answer 14

So your answer to
"How can you use the inscribed angle to find the value of c?"
"it is twice the value of the inscribed angle"
is correct. :)

Answer 15

oh ok

Answer 16

What is the relationship of the inscribed angle to a and b

so how do i do that?

Answer 17

Workn' on it..

Answer 18

ok

Answer 19

@gudden
Solve
What is a formula you could use to find the value of c in terms of a and b?
What is the relationship of the inscribed angle to a and b?

It has been a long time since I did geometry Q's..

Answer 20

thanks for trying to help

Answer 21

i = angle PQR
a , b, c are the angles subtended by the (respective) arcs at the centre.