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A problem involving the calculation of spacecraft orbits.

Definition of a point

Perpendicular definition: Perpendicular simply means 'at right angles'. A line is perpendicular to another if they meet at 90 degrees.

Area of a parallelogram. Definition and formula

Definition of the midpoint of a line segment.

Definition of locus - the shape formed by a set of points that satisfy given crtiteria

Definition of a line segment, a line linking two points.

Definition and properties of a linear pair of angles - two angles that are adjacent and supplementary

An interactive applet that allows you to graphically see the effects of changing the coeeficients in a linear function using sliders

Definition of a line

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