Points & Lines
A part of a line with TWO endpoints.
Segment
A line that intersects a curve or circle at TWO points
Secant
An angle that measures exactly 90 degrees
Right Angle
Circular Segment
A geometry theorem stating that if A, B, and C are points on a circle, and line AC is the diameter, then the angle ABC is a right angle
Thales Theorem
A line segment connecting TWO points on a circle
Chord
A curved line or shape forming part of the circumference of a circle or other curve
Arc
Two Angles that add up to 90 degrees
Complementary
A portion of a circle shaped like a slice of pie, 2 radii and the arc connecting them
Circular Sector
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A line tangent to a circle is always ____________ to the radius corresponding to the point of tangency.
Perpendicular
The point where two or more lines or edges meet, like the corner of a polygon
Vertex
The complete distance around a circle or the boundary line of a circular shape.
Circumference
Two Angles that add up to 180 degrees
Supplementary
A tangent that touches two circles without them overlapping
External Tangent Circumference
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The _________ of any circle through two points is always on the perpendicular bisector of the segment defined by those two points.
Center
A line that divides a segment into TWO EQUAL parts forming a 90 degree angle
Perpendicular Bisector
A line that touches a curve at exactly one point, without crossing it.
Tangent line
A line that splits an angle into two equal parts
Angle Bisector
A tangent that touches two circles internally, passing between them.
Internal tangent
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The centre of two circles tangent each other are aligned with their point of _____
Tangency
A set of points that fulfill the same geometrical property (such as a circle)
Locus/Locii
A circumference that crosses or intersects another shape or line.TWO points of intersection
Intersecting/Secant circumference
Angles with a Common side and vertex
Consecutive
Two or more circles that share the SAME center but have different radii
Concentric Circumference
A shape drawn around another shape so that all the vertices of the inner shape touch the boundary of the outer shape (like a circle around a polygon).
Circumscribed