Question

Tolong dibantu no 1-3 dengan cara

Answer 1

jawaban nomer 1
sin 60 = 1/2 √3
sin 60 = depan / samping
1/2√3  = depan / 14
1/2 √3 x 14 = depan
 7√3    = depan
jawabannya D

jawaban nomer 2
sin 45 = depan / samping
1/2 √2 = depan / 28
1/2√2 x 28 = depan
14 √2  = depan
jawabannya B

jawaban nomer 3
cos 30 = 1/2 √3
cos 30 = samping / miring
1/2 √3 = samping / 45
45 x 1/2√3 = samping
22,5 √3 = samping
23 √3 = samping
jawabannya B

Answer 2

No 1
DE = = 14

DR = √3 = 14√3

jawabnya d

no 2
QR = a = 28 cm
PR = √2 = 14√2

jawabnya b

no 3
BC = 1/2 a √3 = 40 cm
40 cm = 1/2 a √3
80 cm = a√3
80/√3 = a

AC = a =

jawabnya a

rumus segitiga-segitiga istimewa :