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Glite Dictionary
r

r

1 5.3
A line from the center to the edge of a circle or to the surface of a sphere
  • noun
  • Specialized
translation icon : r
  • To calculate the area of a circle, use the formula A = π r squared.

If that, if the blade length is R, then that area is π R-squared.

Examples

  • For a planet in crude terms, v_escape = sqrt(2GM/R) = sqrt(2gR) (the latter in the case of Earth, with g as surface gravity and R as the radius).

    Blog text (18)

  • For a circular door of radius R and mass M, then we have:

    Blog text (21)

  • Then the torque is F * r times sin Theta.

  • So area is π R times R area is π R-squared.

  • The radius of the sphere determines its volume according to the formula V = 4/3 * π r cubed.

  • A circle with a radius of 5 centimeters has a circumference of approximately 31.4 centimeters.

Synonyms

radius
vsr
  • Specialized
10 3.2

A straight line from the center of a circle or sphere to its edge

is the same quantity represented by a single letter symbol

Compounds

CD-R
1 4.1

A disc you can write to only once that holds music or files

R-2
  • NSFW
9.9

A very strong sleeping pill people often use illegally that can be dangerous

R and B
3.2

A style of popular American music with strong blues and jazz roots

the r-word
  • Slur
9.9

A rude word used to insult people with an intellectual disability, replaced by the letter R

Surface Forms

r singular
r plural

Etymology

R comes from the Latin word radius, which meant 'ray' or 'spoke', a straight line from the center of a wheel to its edge. So in math r is the 'ray' that goes from the center of a circle to its edge, which is why we use r for the radius.