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Mathematics 4 Online
johnnn:

http://prntscr.com/ik75vy

johnnn:

@Vocaloid

Vocaloid:

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Vocaloid:

see if you can compare this general rule to your problem and determine the value of x

Vocaloid:

@angle what's the proper terminology for those red segments of the circle I can't remember

johnnn:

so what does x equal?

Vocaloid:

try to compare your problem with my diagram side by side notice how x is equal to one half the sum of the two intersected arcs see if you can apply this logic to your problem

johnnn:

x= 1/2 ?

Vocaloid:

take a look at your problem notice how the two arcs intersected by the angles are AD and BC? x = (1/2)(AD + BC) = ?

johnnn:

im not sure to be fully honest

Vocaloid:

take a look at your diagram see how AD is 140 degrees? see how BC is 90 degrees? x = (1/2)(AD + BC) = ?

johnnn:

230?

Vocaloid:

don't forget the 1/2

johnnn:

115?

Vocaloid:

good, that's it, 115 degrees

johnnn:

i have one more question please http://prntscr.com/ik7c6x

Vocaloid:

I'm not 100% sure on this but I believe those two angles are equal so (x+2) = (3x - 40) then just solve for x

Vocaloid:

actually yeah since they transcribe the same arc they're congruent

johnnn:

x=21?

Vocaloid:

good, that's it

johnnn:

thanks!!!

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