Question

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Answer 1

A. a° + 68°+a° = 180° ( sudut lurus )
    2a = 180 - 68 
    2a = 112   ⇒ a = 112/2 = 56°
    ( 15 b + 12 ) + 2b = 180 ( sudut lurus )
    17 b = 180 - 12 
    17 b = 168 ⇒ b = 168/17 = 9,88°

b. ∠ DEG = a + 68 = 56 + 68 = 124 °
    ∠ KLN = 15 b + 12 = 15 ( 9,88 ) + 12 = 148,2 + 12 = 160 , 2°

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