а) S = 0.5 a h = 0.5 8 10 = 40б) h = 2 S / a = 2 40 / 12 = 80 / 12 = 6.(6)в) S = 0.5 a h20 = 0.5 a 820 = 4aa = 20 / 4a = 5
а) S = 0.5 a h = 0.5 8 10 = 40
б) h = 2 S / a = 2 40 / 12 = 80 / 12 = 6.(6)
в) S = 0.5 a h
20 = 0.5 a 8
20 = 4a
a = 20 / 4
a = 5