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April 21, 2014

April 21, 2014

Posted by **Shelby** on Monday, September 10, 2012 at 8:44pm.

- geometry -
**Reiny**, Monday, September 10, 2012 at 9:30pmso clearly

A+B = 180

B+C = 180

subtract them

A - C = 0

A = C

given: B = 12x+8 , C = 8x - 8

in B+C=180

12x+8 + 8x-8 = 180

20x = 180

x = 9

so C = 72-8 = 64

but A = C

**so A = 64**

check:

A = 64°

B = 116°

C = 64°

is A+ B = 64+116 = 180 ? YES

is B+C = 116+64 = 180° yes

is A = C ? yes

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