luas segitiga di samping adalah

Langsung aja y

X = √25² - 20²
X = √625 - 400
X = √225
X = 15

a = 15 + 23 = 38 cm

L = ½ × a × t
L = ½ × 38 × 20
L = 38 × 10
L = 380 cm²

Semoga berguna +_+