Question

Nomor 1 pakai penyelesaian

Answer 1

Ac/sin 30 = ad/sin 45
ac/(1/2) = 10/(½√2)
ac = 10 × (1/2) ÷ (½√2)
ac = 5 × 2/√2 = 10/√2 = 5√2

bc² = ab² + ac² - 2(ab)(ac) cos 60
bc² = (10√2)² + (5√2)² - 2(10√2)(5√2)(1/2)
bc² = 200 + 50 - 100
bc² = 150
bc = √50 = 5√2