Question

Tentukan nilai x' untuk setiap segitiga pada gambar berikut

note : ' = derajat

Answer 1

A) 50' + x' + x' = 180'
   50' + 2x' = 180'
   2x' = 180' - 50'
   2x' = 130'
    x' = 130' ÷ 2
    x' = 65'
b) 5x' + 2x' + x' = 180'
   8x' = 180'
    x' = 180' ÷ 8 = 22,5'
c) 60' + 3x' + 2x' = 180'
   60' + 5x' = 180'
   5x' = 180' - 60'
   5x' = 120'
    x' = 120' ÷ 5
    x' = 24'
d) 90' + 3x' + 4x' = 180'
    90' + 7x' = 180'
    7x' = 180' - 90'
    7x' = 90'
     x' = 90' ÷ 7
     x' = 12,85'