Odpowiedź:
e - jedna przekątna = 24 cm
f - druga przekątna = 10 cm
P - pole rombu = 1/2 * e * f = 1/2 * 24 cm * 10 cm = 12 cm * 10 cm =
= 120 cm²
a - bok rombu = √[(e/2)² + (f/2)²] = √(12² + 5²) cm = √(144 + 25) cm =
= √169 cm = 13 cm
P = a * h
h - wysokość rombu = P : a = 120 cm² : 13 cm = 9 3/13 cm
P = a² * sinα
sinα = P : a² = 120 cm² : 13² cm² = 120 cm² : 169 cm² = 120/169 =
≈ 0,7101
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Odpowiedź:
e - jedna przekątna = 24 cm
f - druga przekątna = 10 cm
P - pole rombu = 1/2 * e * f = 1/2 * 24 cm * 10 cm = 12 cm * 10 cm =
= 120 cm²
a - bok rombu = √[(e/2)² + (f/2)²] = √(12² + 5²) cm = √(144 + 25) cm =
= √169 cm = 13 cm
P = a * h
h - wysokość rombu = P : a = 120 cm² : 13 cm = 9 3/13 cm
P = a² * sinα
sinα = P : a² = 120 cm² : 13² cm² = 120 cm² : 169 cm² = 120/169 =
≈ 0,7101