Question

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Answer 1

1.

P = 4 l => l = 24 ÷4 = 6 cm.

Cum latura l = 6 cm, aria =

A ( aria ) = l^2 = l×l => A = 6×6 = 36 cm.

Diagonala patratului = l√2 => Diagonala = 6√2

2.

Diagonala = 13 √2 => l ( latura ) = 13 cm

P = 4 *l => P = 4 * 13 = 52 cm.

Aria ( A ) = l *l ( l ^2 ) => A = 13 * 13 = 169 cm.

4.

MOL = triunghi echilateral => toate laturile sunt egale.

Cum MO = 15 cm => ML = OL = MO = 15 cm.

P = ML + OL + MO = 15 +15 + 15 = 45 cm

Sau putem face direct 15 *3 = 45.

Aria ( A ) = l^2 √3 /4 => A = 15 ^2 √/4 => A = 225√3/4 => A = ~ 56√3.