The diameter of the circle is 3.5 m. Find its area.

A circle is a locus of points on a plane equidistant from a given point, which is called the center of a circle.
1) Find the radius of the circle. We are given a diameter. The radius is half the diameter:
R = D: 2,
where R is the radius of the circle, D is the diameter.
R = 3.5: 2 = 1.75 m.
2) Calculate the area of the circle. The area of a circle is denoted by the letter S. Let’s write the formula for calculating the area of a circle:
S = πR²,
where R is the radius of the circle, π = 3.14.
Substituting the known values of the radius and constant π into the formula, we find the area of the circle:
S = 3.14 × 1.75² = 3.14 × 3.06 = 9.6 m².
Answer: The area of a circle is 9.6 m².