Definition of a line segment, a line linking two points.
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Math Open Reference
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Definition and properties of a linear pair of angles - two angles that are adjacent and supplementary
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Math Open Reference
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An interactive applet that allows you to graphically see the effects of changing the coeeficients in a linear function using sliders
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Math Open Reference
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Definition of the intersection of two lines
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Math Open Reference
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Animation showing that in any triangle, the centroid, circumcenter and orthocenter are always collinear - they always lie on a straight line, called the Euler line.
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Math Open Reference
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Definition and properties of a cube.
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Math Open Reference
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CPCTC - a way to remember 'Corresponding Parts of Congruent Triangles are Congruent'
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Math Open Reference
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Definition of a ray when the defining points are on the coordinate plane
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Math Open Reference
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A method for finding the distance from a point to a vertical or horizontal line in coordinate geometry
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Math Open Reference
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