Geom Ch. 1 - Introducing Geometry
Angle measuring less than 90 degrees
Angle measuring more than 90 degrees
Angle measuring exactly 90 degrees
a quadrilateral with opposite sides parallell
a quadrilateral with exactly one pair of parallel sides
lying on the same line
lying on the same plane
point, line, plane
Building blocks of Geometry, undefined terms
two points (the endpoints) all the points between them that are on the line containg them.
segments that have the same measure
a point ON a line segment that is equally distant from both endpoints.
all points on a line that lie on one side of a point (the ray's endpoint).
angles that have the same measure
formed by two rays that share an endpoint so long as they do not overlap
a ray that shares the vertex of the angle and divides the angle into two congruent angles.
the unit in which angles are measured
formed by intersecting lines and do not share a common/adjacent side.
Linear Pair of Angles
a pair of angles that share a side and their non-shared side form a straight line (they are supplementary)
two angles whose sum is 180 degrees
two angles whose sum is 90 degrees
closed figure in a plane, formed by connecting line segmenst endpoint to endpoint with each segment intersecting exactly two others.
a line segment that connects two NON-consecutive vertices
polygons that have exactly the same size and shape.
polygon that has all equal sides
polygon that has all equal angles
polygon that has all equal angles AND sides
a triangle with exactly one right angle
a triangle with all angles less than 90 degrees
a triangle with exactly one obtuse angle
a triangle with no equal sides
a triangle with all equal sides
a triangle with two OR MORE equal sides
a parallelogram with equal sides
a parallelogram with equal angles and sides. (a regular quadrilateral)
a quadrilateral that has two pair of distinct, consecutive congruent sides
set of all points in a PLANE that are a give distance from a given point
diameter (of a circle)
a line segment containing the center of a circle, with endpoints that lie on the circle
a segment from the center of a circle to a point on the circle.
circles that share a center
circles that have the same radius
an arc of a circle whose endpoints are on the diameter
an arc that is smaller than a semicircle (name with 2 letters)
an arc that is larger than a semicircle (name with 3 letters)
an angle whose vertex is at the center of a circle
a segment with both of its endpoints on the circle
a line that intersects a circle exactly once
Point of tangency
point where a tangent line intersects a circle
measure of an arc
equivalent to the measure of it's central angle
set of all points