5.a. 3x + 6x = 180 derajat 9x = 180 derajat x = 20 derajat b. <BAC = 3x : 2 = 3(20) : 2 = 60 : 2 = 30 derajat <ABC = 6x = 6(20) = 120 derajat 6.a. Diagonal AC dan BD = 4 : 3 Luas BelKetu = ½ d1 x d2 150 = ½ 4x x 3x 300 = 12 = x = = 5
*Diagonal AC = 4x = 4(5) = 20 cm *Diagonal BD = 3x = 3(5) = 15 cm
7.a. L = ½ x 9 x 12 = 54
b. L = ½ x 12 x 16 = 96 cm
c. L = ½ x 8y x 7y = 28y
8.a. L = ½ x d1 x d2 150 = ½ x 15 x (3x+2) 300 = 15 x (3x+2) (3x+2)= 3x+2 = 20 3x = 18 x = 6 cm
b. Dignl ke-2 = (3x+2) = (3(6) + 2) = 18 + 2 = 20
Jadikan jawaban terbaik ya ~(^o^~)
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5.a. 3x + 6x = 180 derajat
= 

9x = 180 derajat
x = 20 derajat
b. <BAC = 3x : 2
= 3(20) : 2
= 60 : 2 = 30 derajat
<ABC = 6x
= 6(20) = 120 derajat
6.a. Diagonal AC dan BD = 4 : 3
Luas BelKetu = ½ d1 x d2
150 = ½ 4x x 3x
300 = 12
x =
= 5
*Diagonal AC = 4x = 4(5) = 20 cm
*Diagonal BD = 3x = 3(5) = 15 cm
7.a. L = ½ x 9 x 12
= 54
b. L = ½ x 12 x 16
= 96 cm
c. L = ½ x 8y x 7y
= 28y
8.a. L = ½ x d1 x d2
150 = ½ x 15 x (3x+2)
300 = 15 x (3x+2)
(3x+2)=
3x+2 = 20
3x = 18
x = 6 cm
b. Dignl ke-2 = (3x+2)
= (3(6) + 2)
= 18 + 2
= 20
Jadikan jawaban terbaik ya ~(^o^~)