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A semicircular flowerbed is 10.28 meters in circumference. How many square meters is the area of this flowerbed?
10.28 ÷ (3.14 + 2) = 2m radius
2 × 2 × 3.14 △ 2 = 6.28 square meters semicircle area
The circumference of a semicircle is 20.56 cm. What is the area of the semicircle?
*For the multiplication sign, / for the division sign,
(20.56/(1+3.14/2))/2
A semicircular flower bed, its area is 56.52 square meters, how much is the perimeter of this flower bed?
Because 56.52 × 2 △ 3.14 = 36 (square meters), 6 × 6 = 36. So the radius is 6 meters; the perimeter of flower bed is 3.14 × 6 + 6 × 2, = 18.84 + 12, = 30.84 (meters). Answer: its perimeter is 30.84 meters. So the answer is: 30.84
A semicircular flower bed, its area is 56.52 square meters, how much is the perimeter of this flower bed?
Because 56.52 × 2 △ 3.14 = 36 (square meters), 6 × 6 = 36. So the radius is 6 meters; the perimeter of flower bed is 3.14 × 6 + 6 × 2, = 18.84 + 12, = 30.84 (meters). Answer: its perimeter is 30.84 meters. So the answer is: 30.84
Hope primary school playground has a round flower bed, the perimeter of the flower bed is 56.52 meters
Radius = 56.52 △ 3.14 △ 2 = 9m
Area = 9 × 9 × 3.14 = 254.34 square meters
A semicircular flower bed, its area is 56.52 square meters, how much is the perimeter of this flower bed?
Because 56.52 × 2 △ 3.14 = 36 (square meters), 6 × 6 = 36. So the radius is 6 meters; the perimeter of flower bed is 3.14 × 6 + 6 × 2, = 18.84 + 12, = 30.84 (meters). Answer: its perimeter is 30.84 meters. So the answer is: 30.84
The perimeter of a semicircular flower bed is 51.4 meters, so how many square meters does it cover?
51.4 ÷ (3.14 + 2) = 10m radius
the measure of area:
10×10×3.14÷2
=314÷2
=157 (M2)
A semicircular flowerbed is built in the community. The perimeter of the flowerbed is 102.8 meters. How many square meters is its area?
Radius: 102.8 △ 5.14, = 20 (m); flower bed area: 3.14 × 202 △ 2, = 3.14 × 400 △ 2, = 3.14 × 200, = 628 (M2); answer: its area is 628 m2
A semicircular flowerbed is built in the community. The perimeter of the flowerbed is 102.8 meters. How many square meters is its area?
Radius: 102.8 △ 5.14, = 20 (m); flower bed area: 3.14 × 202 △ 2, = 3.14 × 400 △ 2, = 3.14 × 200, = 628 (M2); answer: its area is 628 m2
The perimeter of a square line is 16 / 25 meters. How many square decimeters is its area
What is the side length
16 / 25 △ 4 = 4 / 25 (m) = 1.6 (decimeter)
What is the area
1.6 × 1.6 = 2.56 (square decimeter)
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