Geometry Terms - chapter 8

Question 1

angle of depression

Answer 1

the angle formed by a horizontal line and a line of sight to a point below

Question 2

angle of elevation

Answer 2

the angle formed by a horizontal line and a line of sight to a point above

Question 3

component form

Answer 3

the form of a vector that lists the horizontal and vertical change from the initial point to the terminal point

Question 4

cosine

Answer 4

In a right triangle, the cosine of angle A is the ratio of the length of of the leg adjacent to angle A to the length of the hypotenuse

Question 5

direction of a vector

Answer 5

the orientation of a vector, which is determined by the angle the vector makes with a horizontal line

Question 6

equal vectors

Answer 6

two vectors that have the same magnitude and the same direction

Question 7

geometric mean

Answer 7

For positive numbers a and b, the positive number x such that a/x = x/b

Question 8

magnitude

Answer 8

the length of a vector

Question 9

parallel vectors

Answer 9

vectors with the same or opposite direction

Question 10

resultant vector

Answer 10

the vector that represents the sum of two given vectors

Question 11

sine

Answer 11

In a right triangle, the sine of angle A is the ratio of the length of of the leg opposite angle A to the length of the hypotenuse

Question 12

tangent of an angle

Answer 12

In a right triangle, the tangent of angle A is the ratio of the length of the leg opposite angle A to the length of the leg adjacent to angle A

Question 13

trigonometric ratio

Answer 13

a ratio of two sides of a right triangle

Question 14

vector

Answer 14

a quantity that has both magnitude and direction