The angles of a triangle always equal 180.
You do 180 - 80 - 45. X = 45.
Answer:
3x-13+2x+4=116( the sum of two interior angle is epual to the sum of exterior angle )
5x =116-9
5x=107
x=21.4 degree
then
angle a= 3*21.4-13
a=51.2degree
angle b=2*21.4+2
b =44.8degree
Step-by-step explanation:
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He can make 12 or 9 because 9x4=36 and 12x3=36
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