TRIGO Flashcards
A space between two rays that extend from a common point called the vertex
Angle
Angles less than 90 degrees
Acute Angle
Angles equal to 90 degrees
Right Angle
Angles greater than 90 degrees
Obtuse Angle
Angle equal to 180 degrees
Straight Angle
Angles greater than 180 degrees
Reflex Angle
Two angles whose sum is 90 degrees
Complementary
Two angles whose sum is 180 degrees
Supplementary
Two angles whose sum is 360 degrees
Explementary
Interval over which the graph of a function repeats
Period
Greatest distance of any point on the graph from a horizontal line which passes halfway between the maximum and minimum values of the function
Amplitude
Number of repetitions or cycles per unit of time
Frequency
Line drawn from one vertex to the midpoint of its opposite side
Median of Triangle
Intersect at a common point called the centroid of the triangle
Median of Triangle
Point of intersection of medians of a triangle
Centroid
Line drawn from one vertex perpendicular to its opposite side
Altitude of Triangle
Intersect at a point called the orthocenter of the triangle
Altitude of Triangle
Point of intersection of the altitudes of the triangle
Orthocenter
Line drawn from one vertex to the opposite side bisecting the included angle between the other two sides
Angle Bisector of Triangle
Intersect at a point called the incenter of the triangle
Angle Bisector of Triangle
Point of intersection if angle bisectors of a triangle
Incenter
Center of inscribed circle
Incenter
Largest circle that can fit inside the triangle and touch all three sides
Incircle
Point of intersection of the perpendicular bisectors of the triangle
Circumcenter
Center of the circumscribed circle
Circumcenter
Circle that passes through all the vertices of the triangle
Circum-circle
Circle tangent to one side of the triangle and prolongation of the other two sides
Escribed Circle (Ex-Circle)
Circle on the surface of a sphere, whose plane passes through the center of the sphere
Great Circle
Circle constructed by a plane crossing the sphere not in its center
Small Circle
An angle formed by the intersection of two great circles
Spherical Angle
A triangle on the surface of the sphere formed by the intersection of three great circles
Spherical Triangle
Least distance on a sphere from a point on the circle to its pole
Polar Distance
Angular distance of the point from the equator ranges from 0 to 90 degrees at the poles
Latitude
Angular distance between the prime meridian and the meridian through the point ranges from 0 and the prime meridian to 180 degrees eastward and -180 degrees westward
Longitude
