Question

кольцо ограничено двумя окружностями радиусы которых равны 3см и 5см чему ровна площадь кольца

Answer 1

S=п*R^2
находим площади кругов
S1=28.27
S2=78.54
S=S1-S2=50.24

Answer 2

Calculation of the Area of the Ring

To find the area of the ring, we need to subtract the area of the smaller circle from the area of the larger circle. The formula for the area of a circle is A = πr^2, where A is the area and r is the radius.

Let's calculate the areas of the two circles:

- The smaller circle has a radius of 3 cm. Using the formula, the area of the smaller circle is A1 = π(3^2) = 9π cm^2.

- The larger circle has a radius of 5 cm. Using the formula, the area of the larger circle is A2 = π(5^2) = 25π cm^2.

Now, let's subtract the area of the smaller circle from the area of the larger circle to find the area of the ring:

Area of the ring = A2 - A1 = 25π - 9π = 16π cm^2.

Therefore, the area of the ring is 16π cm^2.

Please note that the value of π is approximately 3.14159.