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boki trójkąta= 3cm,4cm i 5cm
Jakie pole ma ten romb
P=½*3*4=6cm²
6cm²*4=24cm²
Odp. pole romby wynosi 24 cm².
1/2e = 3 cm - polowa krotszej przekatnej rombu
e = 6cm
1/2f = 4 cm - polowa dluzszej przekatnej
f = 8 cm
a = 5 cm - bok rombu
Sprawdzam bok rombu
(1/2e)² + (1/2f)² = a²
(3 cm)² + (4 cm)² = (5 cm)²
9 cm² + 16 cm² = 25 cm²
25 cm² = 25 cm²
Pole rombu
P= 1/2*e*f
P = 1/2*6cm*8 cm
P = 24 cm²