### Combination of Rhombic Dodecahedron and Octahedron

"...shows the rhombic dodecahedron in combination with the octahedron." -The Encyclopedia Britannica…

### Rhombus Circumscribed About an Ellipse

Illustration of a rhombus circumscribed about an ellipse. This could also be described as an ellipse…

### Door Lozenge Panel

The door lozenge panel is a rhombus shape. It is a 17th century design found in the Nordlingen church…

### Modern Lozenge Panel

The modern lozenge panel is found in a decorative painting. It is a rhombus shape design.

### Modern Lozenge Panel

The modern lozenge panel is found in a decorative painting. It is a rhombus shape design.

### Large Rhombus for Pattern Block Set

One large rhombus for pattern block set.

### Large Rhombuses for Pattern Block Set

Four large rhombuses for pattern block set.

### Large Rhombuses for Pattern Block Set

Four large rhombuses for pattern block set.

### Large Rhombuses for Pattern Block Set

Three large rhombuses for pattern block set.

### Small Rhombuses for Pattern Block Set

Sixteen small rhombuses for pattern block set.

### Primitive Crystal

"When the base is a rhombus, and the prism stands erect, the form is a right rhombic prism." —The…

### Combination of Prisms

An illustration of a combination formed by different prisms

### Quadrilaterals With Lines Joining Midpoints

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

### Rhombic Dodecahedron

"Bounded by twelve rhomb-shaped faces parallel to the six dodecahedral planes of symetry. the angles…

### Negative rhombohedron

"The rhombohedron is a form consists of six rhombic-shaped faces, which correspond in their position…

### Positive rhombohedron

"The rhombohedron is a form consists of six rhombic-shaped faces, which correspond in their position…

### Rhomboid

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

### Rhombus

A rhombus is a rhomboid having equal sides.

### Rhombus

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

### Rhombus

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Rhombus

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Rhombus

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Rhombus

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Divided Square

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

### Shapes Outline Tangram Card

Outlines of shapes (rectangle, parallelogram, isosceles triangle, double arrow, rhombus, hexagon) made…

### Shapes Outline Solution Tangram Card

Solutions for outlines of shapes (rectangle, parallelogram, isosceles triangle, double arrow, rhombus,…

### Shapes Silhouette Tangram Card

Silhouette outlines of shapes (rectangle, parallelogram, isosceles triangle, double arrow, rhombus,…

### Shapes Silhouette Solution Tangram Card

Solutions for silhouette outlines of shapes (rectangle, parallelogram, isosceles triangle, double arrow,…

### Trapezoids With Lines Joining Midpoints

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