• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

Card Range To Study

through

image

Play button

image

Play button

image

Progress

1/78

Click to flip

Use LEFT and RIGHT arrow keys to navigate between flashcards;

Use UP and DOWN arrow keys to flip the card;

H to show hint;

A reads text to speech;

78 Cards in this Set

  • Front
  • Back

Acute Angle

An angle less than 90 degrees

Acute Triangle

A triangle with three acute angles.


Angle

Two rays that share a common endpoint.

Arc

Two points on the circle and the continuous part of the circle between the two points.

Central Angle

An angle with its vertex at the center of the circle, and sides passing through the endpoints of an arc.

Bisects

To divide a figure into two congruent parts.

Chord

Any line segment whose endpoints are on a circle.

Circle

The set of all points in a plane at a given distance from a given point in the plane.

Collinear

Two or more points that lie on the same line.

Complementary Angles

Two positive angles whose sum is 90 degrees

Concave Polygon

A polygon with at least one diagonal outside of the polygon.

Concentric Circles

Two or more coplanar circles sharing the same center.

Cone

A solid (3-dimensional) object that has a circular base and one
vertex

Congruent

Two geometric shapes that are the identical same size and same shape.

Congruent Circles

Two or more circles having radii with the same length

Congruent Segments

Two or more segments having the same measurement/length.

Convex Polygon

A polygon with no diagonal outside of the polygon.

Coplanar

Two or more points that lie on the same plane.

Cylinder

A solid (three-dimensional object) with two circular bases and one curved side.

Decagon

A polygon with ten sides

Definition

A statement that clarifies or explains the meaning of a word or a phrase.

Degree

A measure of an angle.

Diagonal

A line segment that connects two
nonconsecutive vertices.

Diameter

A chord of a circle also containing the circle's center.

Dodecagon

A polygon with twelve sides.

Equiangular Polygon

A polygon with angles having equal measure.

Equilateral Polygon

A polygon with sides having equal length.

Equilateral Triangle

A triangle with three sides of equal length.


Hemisphere

Half a sphere

Heptagon

A polygon with seven sides.

Hexagon

A polygon with six sides

Isosceles triangle

A triangle with at least two sides of equal length.

Vertex Angle

In an isosceles triangle, the angle between
the two sides of equal length.

Base

In an isosceles triangle, the side located opposite the vertex angle.

Base Angles

In an isosceles triangle, the two angles opposite the two sides of equal length.

Kite

A quadrilateral with exactly two pairs of distinct, congruent, consecutive sides.

Line

A straight arrangement of infinitely many points.

Linear Pair of Angles

Two angles sharing a common side and a vertex and their non-common sides form a line.

Line Segment

Two points and all the points between them that lie on the line containing the two points.

Major Arc

An arc of a circle that is larger than a semicircle.

Midpoint

The point on the segment that bisects the segment.

Nonagon

A polygon with nine sides

Octagon

A polygon with eight sides.

Obtuse Angle

An angle whose measure is more than 90 degrees, but less than 180 degrees.

Parallelogram

Any quadrilateral in which both pairs of opposite sides are parallel.

Parallel Lines

Two coplanar lines that lie in the same plane and never intersect.

Pentagon

A polygon with five sides.


Perpendicular Lines

Lines that intersect to form right angles.

Plane

An undefined term that has length and width, but no thickness. It is a flat surface that extends forever.

Point

An undefined term that is basic unit of geometry.

Polygon

A closed figure in a plane, formed by connecting line segments endpoint to endpoint with each segment intersecting exactly two others.

Prism

A polyhedron with two faces that are congruent and parallel polygons and whose other faces are parallelograms formed by segments connecting the corresponding vertices of the bases.

Protractor

A geometry tool used to measure an angle.


Pyramid

A polyhedron with one face that is a polygon and whose other faces are triangles formed by segments that connect the vertices of the base to a point not on the base.

Quadrilateral

A polygon with four sides.

Radius

A segment from the center to a point on the edge of the circle.

Ray

A part of a line that begins at a particular point and extends endlessly in one direction.

Regular Polygon

A polygon that is both equilateral and equiangular

Rhombus

Any equilateral parallelogram.


Right Angle

A ninety degree angle.

Right Triangle

A triangle with one right angle.

Scalene Triangle

A triangle with no sides of equal length.

Sphere

The set of all points in space at a given distance from a given point.

Square

A regular quadrilateral

Square

An equilateral rectangle

Square

An equiangular rhombus

Straight Angle

An angle measuring 180 degrees.

Supplementary Angles

Two positive angles whose sum is 180 degrees

Tangent

A line that touches a circle at exactly one point.

Trapezoid

A quadrilateral with exactly one pair of parallel sides.

Bases

The parallel sides in a trapezoid

Base Angles

In a trapezoid, a pair of angles that share a base as common side.

Triangle

A polygon with three sides.

Undecagon

A polygon with eleven sides

Vertical Angles

Angles formed by two intersecting lines; they share a common vertex but not a common side.

Vertex

The common endpoint for two rays that determine an angle

Vertex

An endpoint of a side of a polygon.

Skew Lines

Two nonparallel lines in space that do not intersect