Tentukan sebgaiberikut. A.nilai x B.

a. (5x + 30) + (2x + 10) = 180 derajat
5x + 2x + 40 = 180 derajat
7x = 180 - 40
7× = 140
× = 140 : 7 = 20 derajat
b. AOC = 5x + 30
= 5.20 + 30
= 100 + 30
= 130 derajat
c. BOC = 2x + 10
= 2.20 + 10
= 40 + 10
= 50 derajat

Berpelurus = 180°
x+y = 180°

A. 5x+30+2x+10=180°
7x+40=180
7x=180-40
7x=140
x= 140/7
x= 20

B. <AOC = 5x+ 30°
5×20+30 = 130°

C. <BOC = 2x+ 10°
2×20 + 10 = 50°

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