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Mathematics 21 Online
OpenStudy (anonymous):

(GEOMETRY QUESTION) For the next 2 questions, let arc GT=18 degrees, arc TA=32 degrees, NA=112 degrees, and arc IN= 74 degrees, in circle V 1. Calculate m

OpenStudy (anonymous):

OpenStudy (anonymous):

@hartnn

hartnn (hartnn):

Construct VA and VN. can u find angle AVN ?

OpenStudy (anonymous):

sorry, yes one second

OpenStudy (anonymous):

112 degrees?

OpenStudy (anonymous):

yes I have multiple choice 22 isnt an answer

hartnn (hartnn):

oops,56 ?

OpenStudy (anonymous):

yes

hartnn (hartnn):

so di u Construct VA and VN. then angle AVN = ??

OpenStudy (anonymous):

i got 46

hartnn (hartnn):

!! measure of arc is what it subtends at center . so angle AVN=112 degrees ok?

OpenStudy (anonymous):

okay.

hartnn (hartnn):

now VAS = 90 degree u know why ??

OpenStudy (anonymous):

its a 90 degree angle

hartnn (hartnn):

its not given,its because line AS is tangent to circle. so now,VAS=VAN+NAS can u find NAS ?

OpenStudy (anonymous):

56

hartnn (hartnn):

how did u find VAN ?

OpenStudy (anonymous):

74-18=56 1/2(56)=28 degrees?

hartnn (hartnn):

in Triangle VAN,let angle VAN=x sum of all angles=180 so 112+x+x=180 from this x=VAN=34 ok? so VAS=VAN+NAS gives 90=34+NAS+gives NAS=56 ok?

OpenStudy (anonymous):

is the answer 28?

OpenStudy (anonymous):

for <GET?

hartnn (hartnn):

nopes,its 56.

OpenStudy (anonymous):

ok

hartnn (hartnn):

can u find arc GI?

hartnn (hartnn):

GI=360-74-112-32-18=124 degrees so arc IT=124+18=142 degrees so angle INT=142/2=71 degrees as arc subtends half the angle at point on circle. similarly,arc NG=112+18+32=162 so angle GIN=162/2=81 in triangle EIN, angle GIN+INT+GET=180 so GET=180-71-81=??

hartnn (hartnn):

so are u getting 28 degrees for GET?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

@hartnn correct?

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