13 terms

# Geo Ch. 9 McDougel Littel

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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>