Diketahui segitiga PQR,besar pelurus sudut R adalah 148 derajat.besar sudut P adalah (3x-10derajat).sudut Q besarnya: (3x+20 derajat). hitunglah: a: besar x b: besar sudut R c. besar sudut Q d. besar sudut P
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A. X => 180 = sudut P + sudut Q + sudut R X=> 180 = (3x-10) + (3x+20) + (180-148) X => 180 = 6x - 10 + 20 + 32 X => 180 = 6x +42 X => 180-42 = 6x X => 138 = 6x X => 138/6 = x X => 23 = x b. R = 180 - 148 = 32derajat c. Q = 3x + 20 = 3*23 + 20 = 69 + 20 = 89derajat d. P = 3x - 10 = 3*23 - 10 = 69 - 10 = 59derajat
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Irfando
A. 180 - (180 - 148) = 3x - 10 + 3x + 20 148 = 6x + 10 138 = 6x 23 = x b. R = 180 - 148 = 32° c. Q = 3(23) + 20 = 69 + 20 = 89° d. P = 3(23) - 10 = 69 - 10 = 59°
X=> 180 = (3x-10) + (3x+20) + (180-148)
X => 180 = 6x - 10 + 20 + 32
X => 180 = 6x +42
X => 180-42 = 6x
X => 138 = 6x
X => 138/6 = x
X => 23 = x
b. R = 180 - 148
= 32derajat
c. Q = 3x + 20
= 3*23 + 20
= 69 + 20
= 89derajat
d. P = 3x - 10
= 3*23 - 10
= 69 - 10
= 59derajat
148 = 6x + 10
138 = 6x
23 = x
b. R = 180 - 148 = 32°
c. Q = 3(23) + 20 = 69 + 20 = 89°
d. P = 3(23) - 10 = 69 - 10 = 59°