This figure is made from a part of a square and a part of a circle.
What is the perimeter of this figure, to the nearest unit?
What is the area of this figure, to the nearest square unit?
Answers
Given:
The figure is made from a part of a square and a part of a circle
To find:
(1) What is the perimeter of this figure, to the nearest unit?
(2) What is the area of this figure, to the nearest square unit?
Solution:
Please refer to the figure attached below
(1). Finding the perimeter of the given figure:
Arc length, ED =
Therefore,
The perimeter of the given figure is,
= AC + CD + ED + EF + AF
= 10 + 5 + 7.85 + 5 + 10
= 37.85 units
rounding off to the nearest unit
≈ 38 units
Thus, the perimeter of the given figure is → 38 units.
(2). Finding the area of the given figure:
Area of the sector, HED =
Area of the square, ABHG = 5² = 25 units²
Area of the square, BCDH = 5² = 25 units²
Area of the square, EFGH = 5² = 25 units²
Therefore,
The area of the given figure is,
= Area(HED) + Area(ABHG) + Area(BCDH) + Area(EFGH)
= 19.64 + 25 + 25 + 25
= 94.64 units²
rounding off to the nearest square unit
≈ 95 units²
Thus, the area of the given figure is → 95 units².
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