A square, only know area = 20, how to calculate side length? The whole calculation process is written out Side length =?

A square, only know area = 20, how to calculate side length? The whole calculation process is written out Side length =?

Do you have a calculator?
Lengthening is the root 20

The estimated area is a square of 20 square meters, and its side length is______ (error less than 0.1M)

4.47
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The area of a square is 20 square meters, so how long is a side?

The length of one side is 5 meters

Use a compass to draw a circle with a diameter of 5cm. The distance between the two feet of the compass is () cm. The circumference of the circle drawn is () and the area is () square cm?

2.5cm 5πcm 6.25πcm

When Xiao Ming draws a circle, the distance between the two feet of the compass is 2.5cm. Calculate the circumference and area of the circle he draws

The radius of this circle is 2.5cm
C = 2 times PI times R
=2 times PI times 2.5
=5pi (about 15.70, pi = 3.14)
S = Pi times the square of R
=PI times the square of 2.5
=25pi (about 19.625, pi = 3.14)
(the key to this problem is to find the radius.)

A regular prism has 12 faces, and the sum of the lengths of all the side edges is 100cm, and the length of the bottom edge is 5cm. How many prisms is this? How much is one side area of this prism?

12-2 = 10 decaprism
100 / 10 = 10cm 10 * 5 = 50cm2
The area of one side of the prism is 50 square centimeters

A regular prism has 12 faces, and the sum of the lengths of all the side edges is 100cm, and the length of the bottom edge is 5cm. How many prisms is this? Find one side face of this prism?

12-2=10
Ten prism
100 / 10 = 10cm 10 * 5 = 50cm2
The area of one side of the prism is 50 square centimeters

An n-prism has 12 faces, the sum of the lengths of all the side edges is 100cm, and the length of the bottom edge is 5cm
An n-prism has 12 faces. The sum of the lengths of all the side edges is 100cm, and the length of the bottom edge is 5cm. 1. How many prisms is this? 2. What is the area of one side of this prism?

A total of 12 faces, remove the top and bottom, there are 10 sides, so it is 10 prism
The total length is 100cm, so the length is 10cm
The side length of the bottom surface is 5cm, so the side area is 10 * 5 = 50cm square

If a regular n prism has 12 sides, and the sum of the lengths of all the side edges is 100cm, and the length of the bottom side is 5cm, then what is the sum of the side areas of the prism

The length of side ridge is 10 cm, and the sum of side area is 5 * 10 * 10 = 500 cm2

In a rectangle of 12cm long and 5cm wide, draw the largest semicircle. The circumference of the semicircle is () cm and the area is () cm

Perimeter = 15.7 area = 196.25