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c)72
a - dł. jednego boku
b - dł. drugiego boku (=2a)
2a + 2*2a = 36
6a = 36
a = 6
b = 12
P = 72, Odp. C)
2.
boki - a, b
P1 = ab
0,9a, 1,1b
P2 = 0,9a * 1,1b = 0,99ab
Odp. A)
3.
875 : 25 = 35
Odp. C)
2.nie
3. 35