Bantu jawab donh, besok harus dikumpul, yg jago MTK, bantu dong

a)

bc = √ab²+ac²

bc = √9²+12²

bc = √81+144

bc = √225

bc = 15 cm

b)

bc = √ac²-ab²

bc = √10²-8²

bc = √100-64

bc = √36

bc = 6 cm

c)

qr = √pq²-pr²

qr = √20²-12²

qr = √400-144

qr = √256

qr = 16 cm