Diketahui segitiga PQR , besar pelurus sudut R = 106° , besar sudut P = (6x-7)°, sudut Q = (2x+9)° hitunglah : a. x° b. besar sudut R c. besar sudut Q d. besar sudut P
thifalkharidamuthia
B. Sudut R = 180' - 106' = 74' a. 6x-7 + 2x+9 + 74 = 180' 8x+76 = 180' 8x = 180' - 76' 8x = 104' x = 104 / 8 x = 13 c. Q = 2x+9 = (2×13) + 9 = 26 + 9 = 35' d. P = 6x-7 = (6×13) - 7 = 78 - 7 = 71'
a. 6x-7 + 2x+9 + 74 = 180'
8x+76 = 180'
8x = 180' - 76'
8x = 104'
x = 104 / 8
x = 13
c. Q = 2x+9
= (2×13) + 9
= 26 + 9
= 35'
d. P = 6x-7
= (6×13) - 7
= 78 - 7
= 71'