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Mathematics 16 Online
OpenStudy (anonymous):

in triangle ABC, A= 65 degrees, and the measure of an exterior angle at C is 117. Find m

OpenStudy (camper4834):

do you know what the question means by exterior angle?

OpenStudy (anonymous):

yes, but I already found b which is 52, I just need help finding c.

OpenStudy (camper4834):

i think i know how you found B but usually people find a and c THEN find b

OpenStudy (camper4834):

|dw:1416267426815:dw|

OpenStudy (camper4834):

|dw:1416267496747:dw|

OpenStudy (camper4834):

if that is a line there which is 180 degrees then C AND the exterior angle must add to become 180

OpenStudy (camper4834):

so if C+117=180 then what is C?

OpenStudy (anonymous):

ah, right, I forgot about that, so would it be 63?

OpenStudy (camper4834):

yes

OpenStudy (camper4834):

my next question is, in your math class do they teach you that A + B is equal to EXTERIOR ANGLE?

OpenStudy (camper4834):

is that how you got b?

OpenStudy (anonymous):

yes.

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