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A list of words for English spelling and vocabulary help and learning. For further help, teaching and lessons about spelling please try our spelling course.

An angle is the space between two lines or planes that intersect.


A diameter is the length of a straight line passing through the center of a circle and connecting two points on the circumference.


In math, infinity refers to something without a limit.


Parallel lines are the same distance apart and never touching.


If something is perpendicular, it is at right angles to the plane of the horizon or a base line.


A radius is the length of a line segment between the center and circumference of a circle or sphere.


A tangent is a line that just touches any one given point of a curve.


Algebra is the mathematics of generalized arithmetical operations.


Calculus is the branch of mathematics that is concerned with limits and with the differentiation and integration of functions.


Geometry is a branch of mathematics that deals with lines, angles and shapes.


Mathematics is a science dealing with the logic of quantity and shape and arrangement.


The mathematical study of triangles is known as trigonometry.

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