Question

Помогите, умоляю,очень надо(

Answer 1

1). S = 4 * 1/2 * 5 * 1 = 10 (кл.²)
2). S = 1/2 a*b = 1/2 * 11 * 6 = 33 (ед.²)
3). S = a² = (6√3)² = 36*3 = 108 (ед.²)
4). P = 4a  => a = P/4 = 60:4 = 15 (ед.)
     S = a² = 15² = 225 (ед.²)
5). S = 4 * 1/2 * 12 * 4 = 96 (ед.²)
6). S = 1/2 * 6 * 5 + 1/2 * 2 * 5 = 15+5 = 20 (кл.²)
7). S = a*h = 5 * 2 = 10 (кл.²) или так:  S = 2 * 1/2 * 4 * 2 + 2 = 8+2 = 10 (кл.²)
8). S = a*h = (3+4)*4 = 28 (ед.²)
9). S = 1/2 * a*h = 1/2 * 18 * 17 = 153 (ед.²)