# Annulus

Calculate the area of two circles annulus k

_{1}(S, 3 cm) and k_{2}(S, 5 cm).**Result****Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):**

**Showing 0 comments:**

**Be the first to comment!**

#### To solve this example are needed these knowledge from mathematics:

## Next similar examples:

- Annulus

Two concentric circles form an annulus of width 10 cm. The radius of the smaller circle is 20 cm. Calculate the content area of annulus. - Annulus

The radius of the larger circle is 8cm, the radius of smaller is 5cm. Calculate the contents of the annulus. - Star

Calculate the content of the shaded part of square with side 19 cm. - Cable

Cable consists of 8 strands, each strand consists of 12 wires with diameter d = 0.5 mm. Calculate the cross-section of the cable. - 22/7 circle

Calculate approximately area of a circle with radius 20 cm. When calculating π use 22/7. - Circle - simple

Calculate the area of a circle in dm^{2}, if its circumference is 31.4 cm. - Pipe cross section

The pipe has an outside diameter 1100 mm and the pipe wall is 100 mm thick. Calculate the cross section of this pipe. - Circle - easy 2

The circle has a radius 6 cm. Calculate: - 6-gon

Perimeter of regular hexagon is 113. Calculate its circumradius (radius of circumscribed circle). - Sidewalk

The city park is a circular bed of flowers with a diameter of 8 meters, around it the whole length is 1 meter wide sidewalk . What is the sidewalk area? - CD disc

A compact disc has a diameter of 11.8 cm. What is the surface area of the disc in square centimeters? - Diameter to area

Find the area of a circle whose diameter is 26cm. - Lawns

Before a sports hall are two equally large rectangular lawns, each measuring 40 m and 12 m. Maintenance of 10m² lawn cost 45 CZK yearly. On each lawn is circular flowerbed with a diameter 8 meters. How much money is needed each year to take on lawn care?. - Two circles

Two circles with a radius 4 cm and 3 cm have a center distance 0.5cm. How many common points have these circles? - Well

Rope with a bucket is fixed on the shaft with the wheel. The shaft has a diameter 50 cm. How many meters will drop bucket when the wheels turn 15 times? - Complementary angles

Two angles are complementary. If one angle measures 10°, what is the measure of the second angle? - 8 degrees

8 degrees Celsius it cools down by 9 degrees Celsius. What is the resultant temperature?