Question

No 10 sama cara nya donk

Answer 1

Tinggi segitiga besar

t² = s² - (a/2)²
t² = 25² - (40/2)²
t² = 625 - 400
t = √225
t = 15 cm

alas segitiga kecil

25/20 = 40/a
25 a = 20 × 40
25 a = 800
a = 800/25
a = 32 cm

tinggi segitiga kecil

t² = s² - (a/2)²
t² = 20² - (32/2)²
t² = 400 - 256
t = √144
t = 12 cm

L I - L II
(1/2 × 40 × 15) - (1/2 × 32 × 12)
= 300 - 192
= 108 cm²