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The circumference of a square is 12 cm. Draw the largest circle in the square. The circumference of the circle is 12 cm______ Cm
The side length of the square: 12 △ 4 = 3 (CM), 3.14 × 3 = 9.42 (CM). Answer: the circumference of the circle is 9.42 cm
The circumference of a circle is 12.56 cm, and its radius is______ Cm, the area is______ Square centimeter
12.56 △ 3.14 △ 2 = 2 (CM); 3.14 × 22 = 3.14 × 4 = 12.56 (square cm); answer: the radius of this circle is 2 cm and the area is 12.56 square cm
The area of a semicircle is 56.52 square centimeters. How about the circumference of the semicircle?
Radius & # 178; = 56.52 × 2 △ 3.14 = 36
Radius = 6 cm
Circumference of semicircle
=Circumference △ 2 + diameter
=2×3.14×6÷2+2×6
=18.84+12
=30.84 cm
The circumference of a semicircle is 20.56 cm. How many cm is its area?
Come on, I have to hand it in
Circumference of semicircle = 3.14 * r + 2R = 20.56
5.14r=20.56
r=4
Full circle area = 3.14 * 4 * 4 = 50.24 square centimeter
Semicircle area = 50.24 / 2 = 25.12 square centimeter
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