tolong bantu jawab ya. terimakasih semuaa:')

a) Nilai x

BC² = AB² - CA²
BC² = (5x)² - (3x)²
BC² = 25x² - 9x²
BC² = 16x²

BC = √16x²
BC = 4x
20 = 4x
x = 20 ÷ 4
x = 5

b) Panjang AB
= 5x
= 5(5)
= 25 cm

c) Panjang CA
= 3x
= 3(5)
= 15 cm

d) Luas Segitiga ABC
= 1/2 × a × t
= 1/2 × 20 × 15
= 150 cm².