Javiix
20. C a = abc b = bca 70 + a + b = 180 | a = 110 - b a + x + 40 = 180 | 110 - b + x + 40 = 180 | b = -30 + x b + 3x - 30 = 180 | -30 + x + 3x -30 = 180 | 4x = 180 + 60 | x = 240 / 4 | x = 60 b = -30 + x | -30 + 60 = 30
19. B 180 - 54 = 126/2 = 63
18. A p = sudut atas segitiga 58 + p + q = 180 | q = 180 - 58 - p | q = 122 - p 3p + q = 180 | 3p + 122 - p = 180 | 2p = 180 - 122 | p = 58 / 2 = 29
a = abc
b = bca
70 + a + b = 180 | a = 110 - b
a + x + 40 = 180 | 110 - b + x + 40 = 180 | b = -30 + x
b + 3x - 30 = 180 | -30 + x + 3x -30 = 180 | 4x = 180 + 60 | x = 240 / 4 | x = 60
b = -30 + x | -30 + 60 = 30
19. B
180 - 54 = 126/2 = 63
18. A
p = sudut atas segitiga
58 + p + q = 180 | q = 180 - 58 - p | q = 122 - p
3p + q = 180 | 3p + 122 - p = 180 | 2p = 180 - 122 | p = 58 / 2 = 29
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