Diameter to area

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

Correct answer:

A =  530.9292 cm2

Step-by-step explanation:

D=26 r=D/2=26/2=13 A=π⋅ r2=3.1416⋅ 132=530.9292 cm2

Try another example


Did you find an error or inaccuracy? Feel free to write us. Thank you!



avatar







You need to know the following knowledge to solve this word math problem:


 
We encourage you to watch this tutorial video on this math problem: video1

Related math problems and questions:

  • 22/7 circle
    red_circle Calculate approximately the area of a circle with radius 20 cm. When calculating π, use 22/7.
  • Circle - easy 2
    circle The circle has a radius 6 cm. Calculate:
  • Radius of the circle
    circle_axes Calculate the radius of the circle whose length is 107 cm larger than its diameter
  • 7 triangle
    coloured_triangle The triangle area is 26.7 cm2. Determine the side length l if appropriate height hl = 45.3 cm.
  • Rectangle 45
    rectangles2 The perimeter of a rectangle is 60cm. If the length of the rectangle is 20cm. a)find the width b)find the area.
  • The collar
    medzikruzie The collar on the dress has the shape of an annulus 6 cm wide. The circumference of the inner circle is 31.4 cm. How much cm2 of fabric is needed to make one collar?
  • Radius
    circle_axes Find the radius of the circle with area S = 200 cm².
  • Diameter
    circular_plot The diameter of a circular plot is 14 dm. Find the circumference and area.
  • Closed drum
    drum Find the total surface area of a closed cylindrical drum if it's diameter is 50 cm and height is 45 cm. (π= 3.14)
  • The surface
    kvader11 The cuboid's surface area is 1714 cm2, the edges of the base are 25 cm and 14 cm long. Find the area of the surface.
  • Circle
    circle How big is an area of a circle if its circumference is 51.2 cm?
  • Sandbox
    sand How much cubic meters of sand is needed to fill the sandbox on the field if it has the shape of a circle with a diameter of 3 m and is 25 cm deep?
  • Quadrant II
    quartes_circle Calculate the radius of the quadrant, which area is equal to area of circle with radius r = 15 cm.
  • Parallelogram
    rovnobeznik Calculate the area and perimeter of a parallelogram whose two sides are long a=24 cm b=22 cm and height ha = 6 cm long.
  • Calculate
    circle_packing Calculate the area of a circle whose radius is 5 dm.
  • Central angle
    obluk What is the length of the arc of a circle with a diameter of 46 cm, which belongs to a central angle of 30°?
  • Annulus
    medzikruzie The radius of the larger circle is 8cm, the radius of smaller is 5cm. Calculate the contents of the annulus.