a) 10 cm
40 cm ÷ 4 boki = 10 cm
b) 16 cm
P = 12cm × x ÷ 2 = 96cm² | ×2
12cm × x = 2 × 96cm² | ÷ 12
x = 192cm ÷ 12
x = 16 cm
mam nadzieję, że pomogłam :)
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a) 10 cm
40 cm ÷ 4 boki = 10 cm
b) 16 cm
P = 12cm × x ÷ 2 = 96cm² | ×2
12cm × x = 2 × 96cm² | ÷ 12
x = 192cm ÷ 12
x = 16 cm
mam nadzieję, że pomogłam :)