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Geometry 11 Online
OpenStudy (anonymous):

The measure of ∠1=

OpenStudy (anonymous):

ganeshie8 (ganeshie8):

you have any ideas how to do this ?

OpenStudy (anonymous):

no idea

ganeshie8 (ganeshie8):

ok, heard of inscribed angle ?

OpenStudy (anonymous):

Umm, Isn't it the one where you have to double it? or something like that

ganeshie8 (ganeshie8):

thats right ! central angle is twice the inscribed angle

ganeshie8 (ganeshie8):

in the given pic, 1 is called inscribed angle

ganeshie8 (ganeshie8):

before finding 1, u need to find the central angle

OpenStudy (anonymous):

How do I do that?

ganeshie8 (ganeshie8):

central angle = 360-125-125

OpenStudy (anonymous):

110?

ganeshie8 (ganeshie8):

yep, thats the central angle

ganeshie8 (ganeshie8):

but the question is asking u to find inscribed angle 1

OpenStudy (anonymous):

And do i double it??

ganeshie8 (ganeshie8):

use this :- inscribed angle = central angle / 2

OpenStudy (anonymous):

Ah, I see :) So inscribed angle = 55

ganeshie8 (ganeshie8):

thats right ! good to knw u see :)

OpenStudy (anonymous):

Thanks for you help and time :D

ganeshie8 (ganeshie8):

np.. welcome (:

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