PRE-CAL (NO SOLVE, GENERAL QUESTIONS)

Question 1

The word ____ comes from a Latin word named ‘angulus,’ meaning “corner.”

Answer 1

Angle

Question 2

Point where the arms meet.

Answer 2

Vertex

Question 3

Two straight line segments form a vertex.

Answer 3

Arms

Question 4

If a ray is rotated about its endpoint, the measure of its rotation is called angle
between its initial and final position.

Answer 4

Angle

Question 5

An ______ is the opposite of an acute angle. It is the angle which lies between 90
degrees and 180 degrees.

Answer 5

Obtuse Angle

Question 6

An ______ is greater than 90 degrees and less than 180 degrees

Answer 6

Obtuse Angle

Question 7

An _______ lies between 0 degree and 90 degrees

Answer 7

Acute Angle

Question 8

An _______ is one that is less than 90 degrees.

Answer 8

Acute Angle

Question 9

A ________ is always equal to 90 degrees.

Answer 9

Right Angle

Question 10

A ______ is 180 degrees when measured

Answer 10

straight angle

Question 11

The figure illustrates a straight angle or a 180-degree angle. You can see that it is just
a straight line because the angle between its arms is 180 degrees.

Answer 11

Straight Angle

Question 12

Any angle that has a measure which is greater than 180 degrees but less than 360
degrees.

Answer 12

Reflex Angle

Question 13

_____ are those angles which are measured in a counterclockwise direction
from the base. In most cases, _____ are used to represent angles in geometry.
From the origin, if an angle is drawn in the (+x, +y) plane, it forms a _______

Answer 13

Positive Angle

Question 14

______ are those angles which are measured in a clockwise direction from the
base. From the origin, if an angle is drawn towards the (x, -y) plane, it forms a _______

Answer 14

Negative angles

Question 15

▪ An amount of opening of an angle.
▪ Amount of the rotation from the initial side of an angle to its terminal side.

Answer 15

Angular Measure

Question 16

▪ Is the measure of the central angle subtended by an arc of a circle whose length is equal
to the radius of the circle.

Answer 16

Radian

Question 17

• Two angles in standard position are said to be ________ if their terminal sides
  coincide.

Answer 17

Co Terminal

Question 18

• Is the length of the arc of the circle that subtends the angle

Answer 18

Linear Measure

Question 19

• Is the circle centered at the origin and of a radius 1 unit. Its equation is given 𝑥
  2 + 𝑦
  2 =
  1

Answer 19

Unit Circle

Question 20

• Is the acute angle formed by the terminal side of 𝜃 and the x-axis.

Answer 20

Reference Angle

Question 21

Is a statement that is true on condition that the variable replaced with the correct value.

Answer 21

Conditional Equation

Question 22

Is defined as the angle formed by the line of sight and the horizontal plane for an object
below the horizontal.

Answer 22

Angle of depression

Question 23

• The angle formed by the horizontal and the line of sight

Answer 23

Angle of Elevation

Question 24

✓ Is an identity that involves trigonometric functions of one or more variables.

Answer 24

Trigonometric Identities