Nomor 5 dan 6 bagaimana minta tolong!???

no.5

gunakan phytagoras untuk mendapatkan nilai BC

.

AC² = AB² + BC²

50² = 40² + BC²

2500 = 1600 + BC²

BC² = 2500 – 1600

BC² = 900

BC = √900

BC = 30

.

AB / BC = AB / BD

50/30 = 40/BD

BD = 30 x 40 / 50

BD = 24cm

( B )

.

6.

BA² = AC² + BC²

9² = 6² + BC²

81 = 36 + BC²

BC² = 81 – 36

BC² = 45

BC = √45

BC = √9 x √5

BC = 3√5

jawaban ( B )