Pada suatu segitiga abc sudut a 30derajat dan sudut b 45derajat. Jika panjang sisi ac akar8cm maka panjang sisi bc adalah? Jawaban: a. 6,0 b. 4,5 c. 3,0 d. 2,0 e. 1,5
whongaliem ....dalili sinus = 2.BC = 2.BC = 4 BC = BC = 2,0 cm .....jawaban D
0 votes Thanks 1
sukartiningsihs
Ac/sin b = bc/sin a akar 8/ sin 45 = bc / sin 30 akar 8 / (1/2 akar 2) = bc / 1/2 bc = 1/2 akar 8 / (1/2 akar 2) = akar 4 = 2 (d)
=
2.BC =
2.BC = 4
BC =
BC = 2,0 cm .....jawaban D
akar 8/ sin 45 = bc / sin 30
akar 8 / (1/2 akar 2) = bc / 1/2
bc = 1/2 akar 8 / (1/2 akar 2)
= akar 4 = 2 (d)