Question

@Kevin

Answer 1

Kevin??? You don't understand something?

Answer 2

Trying to figure out

Answer 3

okay

Answer 4

@jiteshmeghwal9
I'm confused on angle DA + angle EFA = 112 + 248 = 360?

Answer 5

To solve use this equation....

\(\huge{x=\frac{1}{2} \times (\angle 1 - \angle 2)}\)

So input...

\(\huge{x=\frac{1}{2} \times (248-112)}\)

Simplify :)

Answer 6

Hmm.. can you explain to me what is mDA and mEFA ?

is it like this?

Answer 7

More on how to solve measure of vertex outside the circle:
https://www.youtube.com/watch?v=WR7Oz8CXSOk

Answer 8

Ok... I just need to know what mDA and mEFA anyway
I never used that kind of symbol. @jiteshmeghwal9 already explained to me but I'm forget
Anyway your answer is very helpful. Tq so much

Answer 9

@563blackghost

Answer 10

Ok I'm understand now. Thx :D

Answer 11

Here is an example ;)

Answer 12

np ;)

Answer 13

but I'm still curious it's already 360 degrees lol

Answer 14

if u know what I mean

Answer 15

Yes, with the arcs angles it will infact equal 360 degrees but the thing is we are not trying to find an angle inside the arc but a vertex angle on the outside so instead of adding we would subtract to help us find this angle.

Answer 16

Thx!
can u explain to me too another question?

Answer 17

In this photo we are shown the inner arc as well as the outer arc....the thing is is that the arc does not cover the entire circle so it will not equal 360 as the one before.... but the same process is used to find x....

There is a post above that explains these kinds of questions quite well ;)

~~~~~

To solve this we identify what is what....We see that we are aware of the arc PR which is 115 as well as being aware of the inner arc SQ which is 25....we don't know though of what x is but we do know it is a vertex angle outside of the circle....

With this we would use the equation as said before....

\(\huge{\frac{1}{2} \times (\angle 1 - \angle 2)=x}\)

We already identified the angles so we input...

\(\huge{\frac{1}{2} \times ( 115 - 25)=x}\)

In which we simplify...

\(\huge{\frac{90}{2} \rightarrow 45 = x}\)

So the vertex angle is 45 degrees.

Answer 18

@Kevin

Answer 19

Yeah I already know that. Thx
Can you explain too this question :
http://openstudy.com/study#/updates/57e94733e4b037122977b221