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trig
angle messures
14
Mathematics
10th Grade
05/01/2019

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Term

Positive & Negative Rotations

Definition

A rotation is positive if the initial ray is rotated counter-clockwise. A rotation is negative if the initial ray is rotated clockwise.

 

 

Term
Co-terminal Angles 
Definition
Any two angles drawn in standard form position that share a terminal ray
Term
Reference Angles
Definition
The positive acute angles formed by the terminal ray and the x-axis.
Term
Standard position
Definition
An angle is said to be drawn in standard position if its vertex is at the origin and its initial ray points along the positive x-axis.
Term
Radian
Definition
The angle measure of the arc of a circle.
Term
Radius
Definition
The distance from the center of a circle to the outer edge
Term
Arc length
Definition
The distance of a portion calculated by multiplying the central angle by the radius.
Term
Conversion of a Degree to a Radian
Definition
Multiply the number of degrees by n/180 
Term
Conversion Radian to a Degree
Definition
Multiply the number of radians by 180o
Term
Unit Circle
Definition
The unit of a circle has a radius of 1.
Term
Right Triangle
Definition
They have a 90 degree angle.
Term
Hypotenuse
Definition
A long side of a right triangle.
Term
Pythagorean Theorem
Definition
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