5. The area of a rhombus if its vertices are (3, 0), (4, 5), (-1, 4) and (-2,-1) taken in order, is:
d)32 s
12 sq.unit
b)
24 sq.unit
c) 30 sq.unit
(d) 32 sq unit
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Answered by
2
Answer:
24 sq. units.
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Answered by
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b) 24 sq. unit
Let A(3,0) B(4,5) C(-1,4) and D(-2,-1) are the vertices of the rhombus.
Length of diagonal AC = √(x₂ - x₁)² + (y₂ - y₁)²
- x₁ = 3 y₁ = 0
- x₂ =-1 y₂ = 4
= √(-1 - 3)² + (4 - 0)²
= √(-4)² + (4)²
= √16 + 16
= √32
Length of diagonal BD = √(x₂ - x₁)² + (y₂ - y₁)²
- x₁ = 4 y₁ = 5
- x₂ = -2 y₂ = -1
= √(-2-4)² + (-1-5)²
= √(-6)² + (-6)²
= √36 + 36
= √72
Area of rhombus = (1/2) x √32 x √72
= (1/2)4√2 x 6√2
= 24 square units.
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