tolong di jwb yg ada pd gambar yh..

2.
PQ = 13
SQ = 5
maka PS^2 = 13^2 - 5^2
PS^2= 169 - 25
PS^2 = 144
PS = akar 144
PS = 12
maka luas segitiga PQR = 1/2 × a × t
= 1/2 × 15 × 12
= 90 cm^2

3.
PR^2 = 16^2 + 12^2
PR^2 = 256 + 144
PR^2 = 400
PR = akar 400
PR = 20 cm

4.
(4x)^2 + (3x)^2 = 5^2
16x^2 + 9x^2 = 25
25x^2 = 25
x^2 = 25/25
x^2 = 1
x = akar 1
x = 1
d1 = PR = 2 × PT = 2 × 4 = 8
d2 = SQ = 2 × QT = 2 × 3 = 6
luas = 1/2 × d1 × d2
= 1/2 × 6 × 8
= 24 cm^2