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One side of a rhombus is 13 cm and one of its diagonals is 24 cm. What is the area of the rhombus?
120 cm2
130 cm2
156 cm2
312 cm2
- A rhombus has all sides of equal length. Here, one side is given as 13 cm.
- One diagonal is given as 24 cm.
- Diagonals of a rhombus bisect each other at right angles.
- We can find the other diagonal using the Pythagorean theorem. Half-diagonals form a right triangle with the side: (132=(12)2+(d/2)2).
- Solve to find d/2=5, so the other diagonal, d=10.
- Area of a rhombus = (1/2)×Diagonal 1×Diagonal 2=(1/2)×24×10=120.
- Options:
- Option 1: 120 cm²
- Option 2: 130 cm²
- Option 3: 156 cm²
- Option 4: 312 cm²
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