Background for radian
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radian

/ˈreɪdiən/

Meanings
noun
In the International System of Units, the derived unit of plane angular measure of angle equal to the angle subtended at the centre of a circle by an arc of its circumference equal in length to the radius of the circle. Symbol: rad

Examples :

"The angle formed when you wrap the radius of a circle around its edge is one radian, a common unit for measuring angles in math and physics. "
math technical science

Related Words

Illustration measure

measure noun

/ˈmɛʒə/ /ˈmɛʒɚ/

A prescribed quantity or extent.

"The recipe calls for a precise measure of baking soda. "

Illustration subtended

subtended verb

/sʌbˈtɛndɪd/ /səbˈtɛndɪd/

To use an angle to delimit (mark off, enclose) part of a straight or curved line, for example an arc or the opposite side of a triangle.

"The angle formed by looking at the top and bottom of the flagpole from where I stood subtended the entire height of the flagpole. "

Illustration centre

centre noun

/ˈsen.tə(ɹ)/ /ˈsɛn.tɚ/

The point in the interior of a circle that is equidistant from all points on the circumference.

"The teacher marked the centre of the circle on the chalkboard before starting the geometry lesson. "

Illustration circumference

circumference noun

/sɜːˈkʌm.fɹəns/ /sɝːˈkʌm.fɹəns/

The line that bounds a circle or other two-dimensional figure

"The circumference of the circular table was too large to fit in the dining room. "

Illustration angular

angular noun

/-lɑɹ/

A bone in the base of the lower jaw of many birds, reptiles, and fishes.

"The paleontologist carefully brushed away the dirt, revealing the small, fragile angular of the fossilized fish jaw. "

Illustration derived

derived verb

/dɪˈɹaɪvd/

To obtain or receive (something) from something else.

"The student derived the answer to the math problem from the formula. "

Illustration physics

physics noun

/ˈfɪz.ɪks/

A medicine or drug, especially a cathartic or purgative.

"The doctor prescribed a physics to help her patient with indigestion. "

Illustration circle

circle noun

/ˈsɜɹkəl/ [ˈsɜː.kəɫ] [ˈsɝ.kəɫ]

A two-dimensional geometric figure, a line, consisting of the set of all those points in a plane that are equally distant from a given point (center).

"The set of all points (x, y) such that (x − 1)2 + y2 = r2 is a circle of radius r around the point (1, 0)."

Illustration system

system noun

/ˈsɪstəm/

A collection of organized things; a whole composed of relationships among its members.

"There are eight planets in the solar system."

Illustration measuring

measuring verb

/ˈmɛʒ.ə.ɹɪŋ/ /ˈmɛʒ.ɚ.ɪŋ/

To ascertain the quantity of a unit of material via calculated comparison with respect to a standard.

"We measured the temperature with a thermometer.   You should measure the angle with a spirit level."

Illustration length

length noun

/lɛn(t)θ/

The distance measured along the longest dimension of an object.

"The length of the classroom is 20 meters. "

Illustration international

international noun

/ˌɪntəˈnæʃ(ə)n(ə)l/ /ˌɪntɚˈnæʃ(ə)n(ə)l/

Someone who has represented their country in a particular sport.

"The United team includes five England internationals."