Question

pomocy to na jutro dam najjj ​

Answer 1

a)

P = 1/2 · e · f

e = 4 cm

f = 12 cm

P = 1/2 · 4 cm · 12 cm = 2 cm · 12 cm = 24 cm²

b)

P = a · h

a = 10 cm

b = 6,2 cm

P = 10 cm · 6,2 cm = 62 cm²

c)

P = 1/2 · (a + b) · h

a = 12 dm

b = 8 dm

c = 9 cm = 0,9 dm

P = 1/2 · (12 dm + 8 dm) · 0,9 dm = 20 dm · 0,45 dm = 9 dm²