Geometric Shapes and Symbols

This flashcard set covers the vocabulary of various two-dimensional shapes, three-dimensional solids, and common symbols mentioned in the transcript.

Circle

A round plane figure whose boundary consists of points equidistant from a fixed center.

Oval

A closed curve resembling the shape of an egg.

Square

A plane figure with $4$ equal sides and $4$ right angles.

Rectangle

A plane figure with $4$ straight sides and $4$ right angles, where opposite sides are equal.

Triangle

A polygon with $3$ sides and $3$ angles.

Rhombus

A parallelogram with $4$ equal sides.

Trapezoid

A quadrilateral with at least one pair of parallel sides.

Kite

A quadrilateral with two pairs of equal-length sides that are adjacent to each other.

Pentagon

A polygon with $5$ sides.

Hexagon

A polygon with $6$ sides.

Heptagon

A polygon with $7$ sides.

Octagon

A polygon with $8$ sides.

Nonagon

A polygon with $9$ sides.

Decagon

A polygon with $10$ sides.

Parallelogram

A four-sided plane figure with opposite sides parallel.

Star

A geometric shape with points radiating from a central point.

$+$

A symbol used to represent the mathematical operation of addition.

Heart

A symbolic shape representing the organ of the same name or the concept of love.

Cross

A figure consisting of two intersecting lines, typically perpendicular to each other.

Crescent

A shape resembling the curved portion of the moon in its first or last quarter.

Arrow

A symbol consisting of a straight line with a wedge-shaped end used to indicate direction.

Semicircle

A half of a circle or of its circumference.

Scalene

A type of triangle in which all $3$ sides have different lengths.

Ring

A circular band or a torus-shaped object.

Quadrant

Each of $4$ quarters of a circle or a plane.

Trefoil

A graphic form composed of the outline of $3$ overlapping rings.

Quatrefoil

A graphic form composed of the outline of $4$ overlapping rings.

Cube

A three-dimensional solid object bounded by $6$ equal square faces.

Cone

A solid or hollow object which tapers from a circular base to a point.

Cylinder

A solid geometric figure with straight parallel sides and a circular or oval cross-section.

Sphere

A perfectly round three-dimensional geometric object.

Square Pyramid

A pyramid having a square base and $4$ triangular faces.

Triangular Pyramid

A pyramid with a triangular base and $3$ triangular faces.

Rectangular Prism

A three-dimensional solid figure which has $6$ faces that are rectangles.

Triangular Prism

A three-dimensional solid figure with $2$ triangular bases and $3$ rectangular sides.

Hemisphere

A half of a sphere.

Octahedron

A three-dimensional solid figure featuring $8$ plane faces.