This equals 180.
1 and 3 are corresponding angles which means they are the same. 1+2=180 therefore 2+3= 180
Answer:
1,3,4,5,6,10,11,14,16,17,18,20
Step-by-step explanation:
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Answer:
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Answer:
x=25, 120
Step-by-step explanation:
The two angles form a straight line so they add to 180
60 + 4x +20 =180
Combine like terms
4x+80 = 180
Subtract 80 from each side
4x+80-80 =180-80
4x= 100
Divide by 4
4x/4 =100/4
x= 25
The exterior angle is
4x+20 = 4*25+20 =100+20 =120
I don't know if this is right but don't get mad I think it would be -5
