Jawaban:
21) sudut refleks = 360 - 115 = 245
22) NOM = 180 - LOM (sudut lurus)
NOM = 180 - 105 = 75
23) 360 : 12 = 30 (dibagi 12 krn ada 12 putaran jam)
pukul 02.00 = 30 x 2 = 60
24) 5x +2 + 3x -13 + 15 = 180 (segitiga memiliki jumlah sudut 180)
5x + 3x + 2 - 13 + 15 = 180
8x + 4 = 180
8x = 180 - 4
8x = 176
x = 22
maka 7x = 7(22) = 154
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Jawaban:
21) sudut refleks = 360 - 115 = 245
22) NOM = 180 - LOM (sudut lurus)
NOM = 180 - 105 = 75
23) 360 : 12 = 30 (dibagi 12 krn ada 12 putaran jam)
pukul 02.00 = 30 x 2 = 60
24) 5x +2 + 3x -13 + 15 = 180 (segitiga memiliki jumlah sudut 180)
5x + 3x + 2 - 13 + 15 = 180
8x + 4 = 180
8x = 180 - 4
8x = 176
x = 22
maka 7x = 7(22) = 154