midpoint
the point that divides a segment into two congruent segments
degree
a unit of angle measure
segment bisector
a line, ray, or segment that divides a segment into two congruent segments
measure
the use of units to find size or quantity
bisect
to divide into congruent parts
angle
a figure formed by two rays with a common endpoint
secant
a line that intersects a circle at two points
interior of a circle
the set of all points inside a circle
chord
a segment whose endpoints lie on a circle
tangent of a circle
a line that is in the same plane as a circle and intersects the circle at one point
common tangent
a line that is a tangent to two circles
exterior of a circle
all points outside a circle
centroid of a triangle
the point of concurrency of the three medians of a triangle
midsegment of a triangle
a segment that joins the midpoints of two sides of the triangle
altitude of a triangle
a perpendicular segment from a vertex to the line containing (something)
median of a triangle
a segment whose endpoints are a vertex of the triangle and the midpoint of the triangle
point of tangency
the point of intersection of a circle or sphere with a tangent line
equidistant
the same distance from two or more objects