=3. 14×2

=6.28 meters

Area: s =πr the square of π r

=3. 14×(2÷2) square

= 3. Square of14×1

= 1 (m2)

Number of people: 6.28 ÷ 0.5 =12.56 ≈12.

A: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

Give points! friends.

Let me ask you a question. On the computer, how to type the tiny 2 (also a square) behind the number.