tolong ya pke cara kak! pliss thanks before :))

AB^2 = AC^2 - BC^2
AB^2 = 400 - 256
AB^2 = 144
AB = akar 144 = 12 cm

Luas alas = 1/2 x alas x tinggi
= 1/2 × AB x BC
= 1/2 x 12 x 16
= 96

Keliling alas = AB + BC + AC
= 12 + 16 + 20
= 48

Luas permukaan = 2 x Luas alas + (Keliling alas x tinggi)
= 2 x 96 + (48 x 25)
= 192 + 1200
= 1392