tolong bantu saya mengerjakan no. 23 dan no.25

23. SQ = 20 cm - PQ
SQ = 20 cm - 12 cm
SQ = 8 cm

QR = √RS² + SQ²
QR = √15² + 8²
QR = √225 + 64
QR = √289
QR = 17 cm

K.ΔPQR = PQ + QR + RP
K.ΔPQR = 12 cm + 17 cm + 25 cm
K.ΔPQR = 54 cm ✔


25. L = (d₁ × d₂)/2
24 = (6 × d₂)/2
24 = 3 × d₂
d₂ = 24/3
d₂ = 8 cm

s = √(d₁ : 2)² + (d₂ : 2)²
s = √(6 : 2)² + (8 : 2)²
s = √3² + 4²
s = √9 + 16
s = √25
s = 5 cm

K = 4s
K = 4(5)
K = 20 cm ✔