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17. a
18. aku gak tahu caranya =?
maaf ya kalau ada yang salah :) {semoga membantumu}
caranya :
16. sudut RPQ = siku2 = 90<=> maka, sudut RPO = sudut RPQ- sudut OPQ = 90-40 =50 derajat (c)
17. sudut KLM = siku2 = 90<=> maka, sudut KML = 180-(sudut OKL+sudut KLM) =180-(52+90) = 180-142 = 38 derajat (a)
{semoga bermanfaat} :D
sudut O = 180 - 40 - 40 = 100
sudut R = 100/2 = 50 (Sudut keliling)
sudut RQP=40+15=55
sudut PRQ=50
sudut RPQ=180-55-55=70
sudut RPO=70-40=30