1) S = 1/2a*h
36 = 1/2 * 12 * h
h = 36/1/2/12 = 6
2)36 = 1/2*4*a
a = 36/1/2*4 = 18
Рисунок во вложениях
1) S = 1/2a*h
36 = 1/2 * 12 * h
h = 36/1/2/12 = 6
2)36 = 1/2*4*a
a = 36/1/2*4 = 18
Рисунок во вложениях