Trig Flashcards
Two Distinct Points determine ______
Line AB
Line Segment AB:
A portion of a line between AB including AB
Ray:
Portion of line AB that starts at A and continues through B, then keeps on going past B
Angle:
2 rays in a plane with a common endpoint
Vertex:
Common endpoint of an angle
An Angle’s Measure:
Determined by the rotation about the vertex.
Initial side;
ray before rotation
Terminal side:
ray after the rotation
Positive angle:
rotation towards the terminal side that is counterclockwise
Negative Angle:
rotation towards the terminal side that is clockwise
Degree:
most common unit for measuring an angle.
1 degree = _____
1/360 of a complete rotation
Acute Angle:
0<x<90 (not including 0 or 90)
Obtuse Angle:
90<x<180
Straight Angle:
180
Complimentary Angles:
Combine to make a right angle (co for corner)
Supplementary Angles:
Combine to make a straight angle (s for straight)
Finding Complimentary/Supplementary Angles with common variables:
Set the equation = 90 or 180, then isolate the variable. Then, re-input the variables.
One minute:
1/60 of a single degree. Notated as 1’
One second:
1’60 of a minute, or 1/3600 of a degree. Notated as 1”
When adding degrees, minutes, and seconds:
Add like units and keep them separate. simplify by reducing any minutes over 60 to degrees.
