A rhombus has a perimeter of 68 cm and diagonal of 30 cm . Find the area of the rhombus
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Let ABCD is a rhombus .
In which,
AB = BC = CD = AD
Given that,
Perimeter of rhombus ABCD = 68
4 × Side = 48
Side = 48/4
Side = 12 cm
Let AC = 30 cm
As we know that,
Diagonal of rhombus bisect each other at right angled
So,.
OA = OC = 1/2 AC
OA = OC = 1/2 × 30
OA = OC = 15 cm
In right angled triangle OAB
AB² = (OA)² + (OB)²
(OB)² = (AB)² - (OA)²
(OB)² = (12)² - (15)²
(OB)² = 144 - 225
OB = root (-81)
OB = 9 cm
Therefore,
BD = 2 × OB = 2 × 9 = 18 cm
Area of rhombus = 1/2 × ( Product of diagonals)
=> 1/2 × ( 30 × 18)
=> 540/2
=> 270 cm².
★ ★ ★ HOPE IT WILL HELP YOU ★ ★ ★
Let ABCD is a rhombus .
In which,
AB = BC = CD = AD
Given that,
Perimeter of rhombus ABCD = 68
4 × Side = 48
Side = 48/4
Side = 12 cm
Let AC = 30 cm
As we know that,
Diagonal of rhombus bisect each other at right angled
So,.
OA = OC = 1/2 AC
OA = OC = 1/2 × 30
OA = OC = 15 cm
In right angled triangle OAB
AB² = (OA)² + (OB)²
(OB)² = (AB)² - (OA)²
(OB)² = (12)² - (15)²
(OB)² = 144 - 225
OB = root (-81)
OB = 9 cm
Therefore,
BD = 2 × OB = 2 × 9 = 18 cm
Area of rhombus = 1/2 × ( Product of diagonals)
=> 1/2 × ( 30 × 18)
=> 540/2
=> 270 cm².
★ ★ ★ HOPE IT WILL HELP YOU ★ ★ ★
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area of diagonal 240 cmy
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