Matematika

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tolong yakk pake cara yng bener thanks :)..

catatan : sudut A = (x+30)°
sudut B = (4x+10)°
tolong yakk pake cara yng bener thanks :).. catatan : sudut A = (x+30)° sudut B = (4x+10)°

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  • ∠A + ∠B = 180° ( pelurus )
    x + 30 + 4x + 10 = 180
    5x = `80 - 40
    5x = 40
    x = 8
    ∠D = ∠B
    4x + 10
    4 ( 8 ) + 10 = 42°

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