Geo Ch. 9 McDougel Littel

13 terms by l_davis 

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Pythagorean Triple

A set of three positive integers a, b, and c that satisfy the equation c2=a2+b2

Special Right Triangles

Right triabgles whose angle measures are 45, -45, -90, or 30, -60, -90

Trigonometric Ratio

A ratio of the lengths of two sides of a right triangle

Sine

A trigonometric ratio, abbreviated as sin.

Cosine

A trigonometric ratio, abbreviated as cos.

Tangent

A trigonometric ratio, abbreviated as tan.

Angle of Elevation

When you stand and look up at a point in the distance, the angle that your line of sight makes with a line drawn horizontally

Solve a Right Triangle

Determine the measurements of all sides and angles of a right triangle

Magnitude of a Vector

The distance from the initial point to the terminal point of a vector

Direction of a Vector

Determined by the angle that the vector makes with a horizontal line

Equal Vectors

Two vectors that have the same magnitude and direction

Parallel Vectors

Two vectors that have the same or opposite directions

Sum of Two Vectors

The sum of u=<a1,b1> and v=<a2,b2> is u+v=<a1+a2, b1+b2>

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