The sum of the circumference radius and diameter of the circle is 27.56 cm, and the area is calculated

The sum of the circumference radius and diameter of the circle is 27.56 cm, and the area is calculated

The sum of the circumference radius and diameter of the circle is 27.87 cm, and the area is calculated
Radius 27.84 △ 3.14 × 2 + 1 + 2
=27.84÷9.28
=3 cm
Area: 3.14 × 3 × 3 = 28.26 square centimeter

The circumference of a circle is 12.56 meters, its diameter is () meters, and its radius is () meters

12.56 △ 3.14 = 4 (m) diameter
4 △ 2 = 2 (m) radius
The circumference of a circle is 12.56 meters, its diameter is (4 meters), and its radius is (2) meters

The sum of the radius, diameter and circumference of a circle is 18.56 cm. What is the circumference of the circle?

r+2r+2πr = 18.56
r(1+2+2π) = 18.56
r = 18.56 / (1+2+2π)
=2 cm
Perimeter = 2 π r = 12.56 cm

The circumference of a semicircle is 20.56cm. What is its diameter?
Let's give some formulas for the diameter and radius of a semicircle!
Give more, give better points

Actually, this is very simple
You first analyze: the circumference of a semicircle is the diameter plus half of the circumference of a circle
1. Relationship between diameter (R) and circumference: circumference = π R, half circumference = π R / 2
2. Semicircle circumference = π R / 2 + diameter (R) = 3.1415r / 2 + r = 1.57r + r = 2.57r
3.2.57R=20.56
Diameter (R) = 8cm
Perimeter = π r perimeter = 2 π R

If the sum of the circumference of the two circles is 87.92 cm, and the diameter of the big circle is three times the radius of the small circle, the area of the small circle is () square cm

If the sum of the circumference of the two circles is 87.92cm and the diameter of the big circle is three times of the radius of the small circle, the area of the small circle is (38.465) CM & sup2;

The area of a circle is 153.86 square centimeters. What are the circumference and diameter of the circle?

Hello!
Radius: √ (153.86 △ 3.14) = 7cm
Diameter: 7 × 2 = 14 cm
Perimeter: 3.14 × 14 = 43.96cm
PS: √ is the root

If you know that the area of a circle is 113.96, how can you calculate the circumference, diameter and radius of a circle?

Area s = π R ^ 2
So r = root sign (113.96 / 3.14) = 6.02
Perimeter = 2 π r = 37.8
Diameter = 2R = 12.04

The area of a circle is equal to that of a rectangle. The diameter of a circle is 8cm and the length of a rectangle is 16cm. How many cm is the width of a rectangle?

The radius is 82 = 4cm
So the width is 3.14 × 4 × 4 △ 16 = 3.14 cm

If a rectangle and a parallelogram have the same area, whose perimeter is longer?

Definition: if the area of a rectangle and a parallelogram is equal, then the perimeter of the parallelogram is longer

If the perimeter is equal, which is the largest area of rectangle and parallelogram? Why?

The area of a rectangle is length multiplied by width;
The area of a parallelogram is the bottom multiplied by the height. If the bottom is as long as the long side of a rectangle, the height must be less than the wide side of the rectangle!
A rectangle has a large area~