The unit circle is a circle of radius 1 that we can use to pull together Pythagoras and trigonometry. The unit circle has the equation: (1)   This looks like this: If we project a line from the origin to a point on the unit circle we get: If we construct a triangle from this […]

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Triangles are a 3 sided polygon, whose internal angles all add up to 180°. A triangle with one angle of 90° is called a right angle triangle. An example is: If we are looking to find the lengths of the sides of the right angle triangle, and we know the lengths of any 2 of […]

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