on April 23, 2022

How do you find the radius of a semicircle using the perimeter?

Space and Astronomy

How do you find the radius when given the perimeter?

Video quote: You do the same thing divide by pi. So you get 24 equals two r divided by two. And r would equal twelve which is the same part does that make sense yeah.

How do you find the radius of a semicircle?

Calculating the Radius of a Semicircle With a Known Circumference

  1. C = 2 π r C = 2\pi r C=2πr.
  2. S C = 0.5 × 2 π r SC = 0.5 × 2 \pi r SC=0. 5×2πr.
  3. S C = π r SC = \pi r SC=πr.


How do you find the radius?

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.

How do you find the radius when given the perimeter and angle?

Video quote: So if the circumference is 30 I can just take this 30 and plug it in right there because now I know that the circumference is 30. So that means 30 is equal to 2 pi R.

How do you find the radius of a central angle?

Or the central angle and the chord length: Divide the central angle in radians by 2 and perform the sine function on it. Divide the chord length by double the result of step 1. This calculation gives you the radius.

How do you find the radius of a central angle and arc length?

Video quote: So remember that the arc length is equal to the radius. Times theta where theta is the central angle in radians.

How do you find the radius of a circle from an equation?

The center-radius form of the circle equation is in the format (x – h)2 + (y – k)2 = r2, with the center being at the point (h, k) and the radius being “r”. This form of the equation is helpful, since you can easily find the center and the radius.

What is the radii in a circle?

Radius of a circle is the distance from the center of the circle to any point on it’s circumference. It is usually denoted by ‘R’ or ‘r’. This quantity has importance in almost all circle-related formulas. The area and circumference of a circle are also measured in terms of radius.