zad w załączniku CHODZI O 20
P = a * h / 2
a)
P = 3 * 4 / 2 = 3 * 2 = 6 j² ( jednostek kwadratowych)
P = 6 j² = 5 * a / 2 | * 2
12 j² = 5 * a | : 5
12/5 = a
2 2/5 = a
2,4 = a
b) P = 9 * 5 / 2 = 45/2 = 22,5 j²
22,5 j² = 7 * b / 2 | * 2
45 j² = 7 * b | : 7
45/7 = b
6 3/7 = b
c) P = 3 * 5 / 2 = 15/2 = 7,5 j²
7,5 j² = 2 * c / 2
7, 5 = c
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P = a * h / 2
a)
P = 3 * 4 / 2 = 3 * 2 = 6 j² ( jednostek kwadratowych)
P = 6 j² = 5 * a / 2 | * 2
12 j² = 5 * a | : 5
12/5 = a
2 2/5 = a
2,4 = a
b) P = 9 * 5 / 2 = 45/2 = 22,5 j²
22,5 j² = 7 * b / 2 | * 2
45 j² = 7 * b | : 7
45/7 = b
6 3/7 = b
c) P = 3 * 5 / 2 = 15/2 = 7,5 j²
7,5 j² = 2 * c / 2
7, 5 = c