The radius of the circle is 4 cm. Find the area of this circle.

A circle is a locus of points on a plane equidistant from a given point, which is called the center of a circle.
Let’s write a formula for calculating the area of a circle:
S = πR²,
where S is the area of the circle, R is the radius of the circle, π = 3.14.
Substituting the known radius of the circle, constant π, into the formula, we calculate the area:
S = 3.14 × 4² = 3.14 × 16 = 50.24 = 50 cm².
Answer: the area of the circle is 50 cm².