hitunglah luas dan keliling trapesium sama kaki dengan panjang sisi sejajar 24cm dan 40cm dan tingginya 15cm

L = (24 + 40) t/2
L = (24 + 40)15/2
L = 64/2 × 15
L = 480 cm² ✔

Cari sisi miring segitiga :
s = √[(40-24):2]² + t²
s = √(16:2)² + 15²
s = √8² + 15²
s = √64 + 225
s = √289
s = 17 cm

K = 24 + 40 + 2(s)
K = 64 + 2(17)
K = 64 + 34
K = 98 cm ✔

sisi miring = akar (15^2 + ((40-24)/2)^2)
= akar (15^2 + 8^2)
= akar (225 + 64)
= akar 289
= 17 cm
L = 1/2×(a+b)×t
= 1/2×(40+24)×15
= 1/2×64×15
= 480 cm^2
K = 40+24+17+17
= 98 cm