ClipArt ETC
A square divided evenly by a dotted line.

Divided Square

A square divided evenly by a dotted line.

A square divided evenly by a dotted line, known as the diagonal.

Divided Square

A square divided evenly by a dotted line, known as the diagonal.

A rectangle divided evenly by a dotted line.

Divided Rectangle

A rectangle divided evenly by a dotted line.

A trapezoid is a quadrilateral having only two of its sides parallel.

Trapezoid

A trapezoid is a quadrilateral having only two of its sides parallel.

A quadrilateral plane figure having four right angles and its opposite sides equal in length. The adjacent sides are unequal.

Rectangle

A quadrilateral plane figure having four right angles and its opposite sides equal in length. The adjacent…

A small quadrilateral sail, set on a small mast of a ship's taffrail.

Ringtail Sailboat

A small quadrilateral sail, set on a small mast of a ship's taffrail.

Parallelogram with angles labeled.

Parallelogram

Parallelogram with angles labeled.

Quadrilateral polygon with diagonal drawn.

Quadrilateral Polygon

Quadrilateral polygon with diagonal drawn.

Rectangle with angles labeled. Parallelogram with right angles.

Rectangle

Rectangle with angles labeled. Parallelogram with right angles.

Square with angles labeled. A rectangle with four equal sides.

Square

Square with angles labeled. A rectangle with four equal sides.

Trapezoid with angles and height labeled.

Trapezoid

Trapezoid with angles and height labeled.

Illustration of a figure made up of 4 smaller figures (triangles).

Composite Figure

Illustration of a figure made up of 4 smaller figures (triangles).

Illustration of a quadrilateral, a four-sided figure.

Quadrilateral

Illustration of a quadrilateral, a four-sided figure.

An illustration of a prismatoid with faces that are quadrilaterals.

Prismatoid With Quadrilateral Faces

An illustration of a prismatoid with faces that are quadrilaterals.

An illustration of a composite figure made up of a quadrilateral frustum and half of a cylinder. Frustum edges range between 6 feet and 11 feet 5 inches and cylinder has a height of 12 feet.

Composite Figure of Quadrilateral Frustum With Half of a Cylinder Attached

An illustration of a composite figure made up of a quadrilateral frustum and half of a cylinder. Frustum…

Polygon consisting of 4 sides

4-sided Polygon

Polygon consisting of 4 sides

1/4 of a 4 sided polygon

Fractions of 4-sided Polygon

1/4 of a 4 sided polygon

2/4 of a 4 sided polygon

Fractions of 4-sided Polygon

2/4 of a 4 sided polygon

3/4 of a 4 sided polygon

Fractions of 4-sided Polygon

3/4 of a 4 sided polygon

4/4 of a 4 sided polygon

Fractions of 4-sided Polygon

4/4 of a 4 sided polygon

Illustration of a trapezium, a quadrilateral which has no two sides parallel.

Trapezium

Illustration of a trapezium, a quadrilateral which has no two sides parallel.

Illustration of a trapezoid, a quadrilateral which has two and only two sides parallel.

Trapezoid

Illustration of a trapezoid, a quadrilateral which has two and only two sides parallel.

Illustration of a parallelogram, a quadrilateral which has opposite sides parallel.

Parallelogram

Illustration of a parallelogram, a quadrilateral which has opposite sides parallel.

Illustration of a square, a rectangle with all sides equal.

Square

Illustration of a square, a rectangle with all sides equal.

Illustration of a rectangle, which is a parallelogram with all angles right angles.

Rectangle

Illustration of a rectangle, which is a parallelogram with all angles right angles.

Illustration of a rhombus, which is a rhomboid with all sides equal.

Rhombus

Illustration of a rhombus, which is a rhomboid with all sides equal.

Illustration of a rhomboid, which is a parallelogram which has its angles oblique angles.

Rhomboid

Illustration of a rhomboid, which is a parallelogram which has its angles oblique angles.

Illustration of a parallelogram with altitude and diagonal drawn.

Altitude and Diagonal of a Parallelogram

Illustration of a parallelogram with altitude and diagonal drawn.

Illustration of a parallelogram with diagonals drawn to show they bisect each other.

Parallelogram With Diagonals Bisecting Each Other

Illustration of a parallelogram with diagonals drawn to show they bisect each other.

Illustration of a two equal parallelograms. Two parallelograms are equal, if two sides and the included angle of the one are equal, respectively, to two sides and the included angle of the other.

Equal Parallelograms

Illustration of a two equal parallelograms. Two parallelograms are equal, if two sides and the included…

Illustration of a trapezoid, with the median drawn. The median of a trapezoid is parallel to the bases, and is equal to half the sum of the bases.

Trapezoid With Median

Illustration of a trapezoid, with the median drawn. The median of a trapezoid is parallel to the bases,…

Illustration of a polygon with a diagonal drawn. A diagonal of a polygon is a line joining the vertices of two angles not adjacent (AC).

Polygon With Diagonal

Illustration of a polygon with a diagonal drawn. A diagonal of a polygon is a line joining the vertices…

Illustration of a convex polygon. A polygon is convex when no side when produced will enter the polygon.

Convex Polygon

Illustration of a convex polygon. A polygon is convex when no side when produced will enter the polygon.

Illustration of a concave polygon. A concave polygon is a polygon of which tow or more sides, if produced, will enter the polygon.

Concave Polygon

Illustration of a concave polygon. A concave polygon is a polygon of which tow or more sides, if produced,…

Illustration of a two polygons. Polygons may be mutually equiangular without being mutually equilateral.

Equiangular Polygons

Illustration of a two polygons. Polygons may be mutually equiangular without being mutually equilateral.

Illustration of two polygons. Polygons may be mutually equilateral without being mutually equiangular (except for triangles).

Equilateral Polygons

Illustration of two polygons. Polygons may be mutually equilateral without being mutually equiangular…

Illustration of a polygon with interior angles drawn.

Interior Angles of Polygons

Illustration of a polygon with interior angles drawn.

Illustration of a polygon with exterior angles drawn.

Exterior Angles of Polygons

Illustration of a polygon with exterior angles drawn.

Illustration of an axis of symmetry drawn with respect to a quadrilateral.

Axis of Symmetry Drawn on a Quadrilateral

Illustration of an axis of symmetry drawn with respect to a quadrilateral.

Illustration of a quadrilateral which has two adjacent sides equal and the other two sides equal. It is symmetrical with respect to the diagonal joining the vertices of the angles formed by the equal sides, and the diagonals are perpendicular to each other.

Quadrilateral with Symmetry

Illustration of a quadrilateral which has two adjacent sides equal and the other two sides equal. It…

Illustration to show that if the diagonals of a quadrilateral bisect each other, the figure is a parallelogram.

Quadrilateral With Diagonals

Illustration to show that if the diagonals of a quadrilateral bisect each other, the figure is a parallelogram.

Illustration to show that if the diagonals of a parallelogram are equal, the figure is a rectangle.

Rectangle With Diagonals

Illustration to show that if the diagonals of a parallelogram are equal, the figure is a rectangle.

Illustration to show that when lines from two opposite vertices of a parallelogram to the midpoints of the opposite sides are drawn, they trisect the diagonal.

Parallelogram With Lines From opposite Vertices to Midpoints

Illustration to show that when lines from two opposite vertices of a parallelogram to the midpoints…

Illustrations to show quadrilaterals with lines joining the midpoints of the sides of any quadrilateral, taken in order.

Quadrilaterals With Lines Joining Midpoints

Illustrations to show quadrilaterals with lines joining the midpoints of the sides of any quadrilateral,…

Illustrations to show trapezoids with lines joining the midpoints of the sides of any quadrilateral, taken in order.

Trapezoids With Lines Joining Midpoints

Illustrations to show trapezoids with lines joining the midpoints of the sides of any quadrilateral,…

Illustrations to show that if two parallel lines are cut by a transversal, the bisectors of the interior angles form a rectangle.

Rectangle Formed When Two Parallel Lines are Cut by a Transversal

Illustrations to show that if two parallel lines are cut by a transversal, the bisectors of the interior…

Illustrations of a trapezoid with a line joining the midpoints of the diagonals.

Trapezoid With Lines Joining the Midpoints of the Diagonals

Illustrations of a trapezoid with a line joining the midpoints of the diagonals.

Illustrations of a trapezoid with a line segment drawn parallel to one side

Trapezoid With Line Segment Parallel to One Side

Illustrations of a trapezoid with a line segment drawn parallel to one side

Illustrations of a trapezoid.

Trapezoid

Illustrations of a trapezoid.

Illustrations of a trapezoid with diagonals drawn.

Trapezoid With Diagonals

Illustrations of a trapezoid with diagonals drawn.

Illustrations of an isosceles trapezoid with equal diagonals drawn.

Isosceles Trapezoid With Equal Diagonals

Illustrations of an isosceles trapezoid with equal diagonals drawn.

Illustrations of a square with diagonal DB, BE cut off equal to BC, and EF drawn perpendicular to BD meeting DC at F. DE is equal to EF and to FC.

Square With Diagonal

Illustrations of a square with diagonal DB, BE cut off equal to BC, and EF drawn perpendicular to BD…

Illustration showing a circle with a quadrilateral inscribed.

Circle With Inscribed Quadrilateral

Illustration showing a circle with a quadrilateral inscribed.

Illustration showing a circle with an inscribed and circumscribed quadrilateral.

Circle With Inscribed and Circumscribed Quadrilaterals

Illustration showing a circle with an inscribed and circumscribed quadrilateral.

Illustration showing a circle with an inscribed quadrilateral and triangles formed by extended chords.

Circle With Inscribed Quadrilateral and Triangles Formed

Illustration showing a circle with an inscribed quadrilateral and triangles formed by extended chords.

Quadrilateral with intersecting diagonals and segment connecting midpoints.

Quadrilateral With Diagonals and Midpoints Joined

Quadrilateral with intersecting diagonals and segment connecting midpoints.

A flashcard featuring an illustration of a polygon with four unequal sides

Flashcard of a polygon with four unequal sides

A flashcard featuring an illustration of a polygon with four unequal sides

A flashcard featuring an illustration of a Rectangle

Flashcard of a Rectangle

A flashcard featuring an illustration of a Rectangle

A flashcard featuring an illustration of a Rhombus

Flashcard of a Rhombus

A flashcard featuring an illustration of a Rhombus

A flashcard featuring an illustration of a polygon with four equal sides

Flashcard of a polygon with four equal sides

A flashcard featuring an illustration of a polygon with four equal sides