1.
6cm × 8cm ÷ 2 = 48cm² ÷ 2 = 24cm²
2.
a) 6cm × 9cm ÷ 2 = 54cm² ÷ 2 = 27cm²
b) 5cm × 12cm ÷ 2 = 60cm² ÷ 2 = 30cm²
c) 8cm × 7cm ÷ 2 = 56cm² ÷ 2 = 28cm²
3.
8cm - 3cm = 5cm
[tex]\frac{6cm(8cm + 5cm)}{2}[/tex] = 6cm × (8cm + 5cm) ÷ 2 = 6cm × 13cm ÷ 2 = 78cm² ÷ 2 = 39cm²
Liczę Na Naj ❤
