The reason being is that radii ( 2⋅radius ) are equal to the diameter of a circle. Therefore, if the diameter is equal to 30m, then the two radii equals 30m. However, you want the radius, so half of 30m ( 302 ) is 15m.
What is the diameter of a 30 cm circle?
94.25 centimeters
Answer: The circumference of a circle with a diameter of 30 centimeters would be 94.25 centimeters.
What is the radius of a circle if the diameter?
Just remember to divide the diameter by two to get the radius. If you were asked to find the radius instead of the diameter, you would simply divide 7 feet by 2 because the radius is one-half the measure of the diameter. The radius of the circle is 3.5 feet.
What is the measure of the radius?
Radius is always half the length of its diameter.
What is a radius and diameter?
While the radius of a circle runs from its center to its edge, the diameter runs from edge to edge and cuts through the center. Radius and diameter are close friends – a circle’s radius is half the length of its diameter (or: a circle’s diameter is twice the length of its radius).
What size is 30 by 40 cm in inches?
Standard Metric ‘CM’ picture frame sizes
| Centimetres (cm) | Millimetres (mm) | Inches |
|---|---|---|
| 30 x 40 cm | 300 x 400 mm | 11.81″ x 15.75″ |
| 35 x 100 cm | 350 x 1000 mm | 13.78″ x 39.37″ |
| 40 x 40 cm | 400 x 400 mm | 15.75″ x 15.75″ |
| 40 x 50 cm | 400 x 500 mm | 15.75″ x 19.69″ |
Which shows the diameter of a circle?
Diameter of a Circle Using Radius Radius is the length of the line segment from the center of the circle to an endpoint on the circle and diameter is twice the length of the radius of the circle. Using this definition, the formula for the diameter is: D = Radius × 2.
What is the measure of the diameter?
The diameter measures the circle at its largest point across. Another definition that is related to the diameter is the radius. It is the measurement from the center of the circle to its edge. The radius.
