Supplementary angles
A + B is equal to 180 degrees
complimentary angles
A + B = 180 degrees
Adjacent angles
two angles that are next to each other
perpendicular meaning
two lines intersecting at a 90 degree angle
All angles in a triangle add up to
180 degrees
all external angles of a triangle add up to
360 degrees
all external and internal angles of a parallelogram equal
360 degrees
radius
The line that joins to center of the circle to the outer boundary
Diameter
the line segment whose endpoints lie on the circle and that passes through the center
Chord
the line segment whose endpoints lie on the circle and divides the circle into two regions, the diameter is the longest chord
Secant
an extended chord that cuts the circle at two distinct points
Arc
the connected section of the circumference of a circle
tangent
a line that touches the circumference of a circle at a point
sector
a region bounded by two radii of equal length with a common sector
Segment
the segment of a circle is the region bounded by a chord and the arc subtended by the chord
subtended meaning
For circle theorems, a subtended angle is an angle within a circle that is created by two chords meeting at a point on the circumference of a circle.
bisect
to divide something into two equal parts
alternate Angles are
equal
co-interior Angles add up to
180 degrees
corresponding Angles are
equal
adjacent angles in a parallelogram always add up to
180 degrees
opposite angles in a parallelogram are always
equal
concave polygon
interior angles can be greater than 180 degrees
convex polygon
all interior angles less than 180 degrees
