Solution: Because the diameter of the round table is 1.8m,
Then the circumference of the round table =πx diameter = 3.14x1.8m = 5.652m = 565.2cm. ..
Everyone occupies a position of 70 cm,
Then the number of people who can sit at the round table is 565.2 cm/70 cm ≈8.
That is, the round table can seat about 8 people.
Extended data:
1, calculation formula of circle
If the radius of the circle is r, the calculation formula of the circle is as follows.
The radius of the circle is R=2*r, the circumference of the circle is 2 π * r = π * r, and the area of the circle is s = π * r 2.
2, the nature of the circle
The (1) circle is an axisymmetric figure, and its symmetry axis is an arbitrary straight line passing through the center of the circle. A circle is also a central symmetric figure, and its symmetric center is the center of the circle.
(2) If two circles intersect, the line segment (or straight line) connecting the centers of the two circles vertically bisects the common chord.
3, division calculation method
(1) long division
(2) Short division
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