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As shown in figure, P Q is a quarter circle with center R. □ABCR is a rectangle with A on
P R, C on RQ and B on the circle. OB = 4, OQ = 8 where O is center of rectangle. Find area
of rectangle ABCR.?
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As shown in figure, P Q is a quarter circle with center R. □ABCR is a ...
Understanding the Geometry
To analyze the problem, we start by identifying the key components of the geometric figure.
- Quarter Circle: P Q is a quarter circle with center R.
- Rectangle: ABCD is a rectangle inscribed within the quarter circle.
Given Data
- OB (Distance from center O to point B on the circle) = 4 units
- OQ (Distance from center O to point Q) = 8 units
Finding Dimensions of the Rectangle
- Radius of Quarter Circle: Since the quarter circle has a radius of 8 units (OQ), the rectangle's top side (BC) will be parallel to the x-axis, and the height (AB) will be vertical.
- Height of Rectangle: The height from O to B is given as 4 units, which implies:
- OB = 4 (height)
- Width of Rectangle: The base width (AC) can be calculated using the relation of circle radius:
- Since OB is vertical and the radius is horizontal, we determine that:
- OA (half of the base) = √(radius^2 - OB^2)
- Calculating OA:
- OA = √(8^2 - 4^2) = √(64 - 16) = √48 = 4√3
- Total Width (AC): Since OA is half, total width = 2 * OA = 8√3
Calculating Area of Rectangle
- Area Formula: Area = Height * Width
- Area = 4 * 8√3 = 32√3 square units
Conclusion
The area of rectangle ABCR is 32√3 square units. This represents the space enclosed within the rectangle inscribed in the quarter circle.
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As shown in figure, P Q is a quarter circle with center R. □ABCR is a rectangle with A on P R, C on RQ and B on the circle. OB = 4, OQ = 8 where O is center of rectangle. Find area of rectangle ABCR.?
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