1. Triangular prism
   Lens
2. Pentagon
   Cone

A lens is a two-dimensional shape composed of two convex arcs. The shape can also be created by having two circles intersect with the common area making up the lens.

1. Square
   Cube
2. Nonagon
   Annulus

A nonagon is a nine-sided polygon. If it is a regular nonagon, all sides and angles are equal. If it is an irregular nonagon, the sides and angles are unequal.

1. Heptagon
   Octagon
2. Sphere
   Kite

A heptagon is a seven-sided polygon and can be either regular (in which all sides and angles are equal) or irregular (in which the sides or angles are not equal).

1. Square
   Sphere
2. Star
   Cylinder

A cylinder is a three-dimensional shape bound by two round shapes (usually circles) at the top and the bottom and two parallel lines which connect them.

1. Rectangle
   Hexagonal pyramid
2. Cuboid
   Crescent

A cuboid is a three-dimensional convex polyhedron bound by six quadrilateral face. Each of the faces is rectangular, and all of its corners are 90-degree angles.

1. Equilateral triangle
   Rectangle
2. Trapezium
   Heart

A rectangle is described as a quadrilateral polygon which has four right angles. Conventional rectangles have two sides which are longer than the other two, but all angles are still equal to 90 degrees.

1. Ellipse
   Scalene Triangle
2. Heart
   Triangular prism

An ellipse can be described as a curve in a plane which surrounds two focal points whose sum of the distance of those focal points is constant for every other point in the curve. Many of the celestial bodies in the solar system orbit around the sun in an elliptical manner.

1. Cone
   Isoscles Triangle
2. Star
   Tetrahedron

A cone is a three-dimensional shape which thins out from its flat base to a point referred to​ as the apex. Cones have a circular face with curved sides which roll up to a point at the top.

1. Sphere
   Parallelogram
2. Rhombus
   Ellipsoid

A rhombus is a non-self-intersecting quadrilateral whose four sides are all equal in length. Its diagonals also bisect its interior angle. The shape had a similar appearance to a diamond and is often referred to as one.

1. Right angle triangle
   Square pyramid
2. Rhombus
   Rectangle

A square pyramid is a type of pyramid which has a square base and all of the lateral edges have the same length. The sides, which are not a part of the base, are congruent isosceles triangles.

1. Obtuse triangle
   Cylinder
2. Acute triangle
   Frustum

A frustum is a shape in which the portion of a solid (pyramid or cone) is left after cutting off a portion with a plane, parallel to the base.

1. Cube
   Acute triangle
2. Trapezoid
   Square

A trapezoid is a quadrilateral shape which has two sides which are parallel to one another. When two of the sides other than the base are parallel, it is referred to as an isosceles trapezoid.

1. Crescent
   Rectangle
2. Heart
   Kite

A kite, also called a deltoid, is a quadrilateral which has four sides that can be grouped into two pairs of equal length sides, which are always adjacent to each other.

1. Rhombus
   Triangular prism
2. Star
   Parallelogram

A triangular prism is a three-sided polyhedron which is made up of a triangular base and three faces which join their corresponding sides. All of the cross sections which are parallel to the base are the same size triangles.

1. Ellipse
   Tetrahedron
2. Kite
   Rhombus

A tetrahedron, also called a triangular pyramid, is a type of polyhedron which is composed of four triangular faces and four vertex corners.

1. Obtuse triangle
   Trapezoid
2. Circle
   Rectangle

An obtuse triangle is a type of triangle which has an angle that is greater than 90 degrees - obtuse angle. Since the total angle of all triangles must add up to 180 degrees, it is impossible for a triangle to have more than one obtuse angle.

1. Decagon
   Trapezium
2. Right-angle triangle
   Pentagon

A right-angled triangle is a triangle in which one of its angles is a right angle. The side opposite to the angle is called the hypotenuse and the sides adjacent to the true angle are called the legs.

1. Square
   Acute triangle
2. Pentagon
   Cube

A cube is a three-dimensional shape which is bound by six square faces and sides, with three of them meeting at each vertex. It is also a type of rectangular hexahedron and is dual to the octahedron.

1. Scalene triangle
   Decagon
2. Circle
   Octagon

A decagon is a 10-sided polygon whose sides are all straight and equal with each of its internal corners. The angles are always equal to 144 degrees and all add up to 1440 degrees.

1. Star
   Ellipse
2. Hexagonal prism
   Pentagon

A hexagonal prism is a combination of a prism and polygon which has a hexagonal base and consists of eight faces, 18 edges and 12 vertices. Because it has eight faces, it is also a type of octagon.

1. Equilateral triangle
   Hexagon
2. Heart
   Heptagon

An equilateral triangle can be described as a type of triangle which is equal in length on all three sides. This shape is also equiangular, meaning that all of the internal angles are the same.

1. Octagon
   Isosceles triangle
2. Kite
   Square

An isosceles triangle is a type of triangle in which two of its sides are of equal length. The two equal sides are referred to as the legs, while the third side is referred to as the base. One example of this type of triangle is the golden triangle.

1. Decagon
   Nonagon
2. Scalene triangle
   Octagon

A scalene triangle is a type of triangle in which all of its sides are different in length. Because of the length disparity, all of its angles are also different, but they still add up to 360 degrees.

1. Ellipse
   Dodecahedron
2. Square prism
   Decagon

A square prism is a three-dimensional cuboid whose base is composed of squares. The opposite sides and angles are all equal. An example of this shape is a box of tissues.

1. Sphere
   Crescent
2. Cuboid
   Parallelogram

A parallelogram is a simple quadrilateral which has two sets of parallel sides. The opposite sides of the shape are both equal in length and the opposite angles are also equal.

1. Parallelogram
   Ellipsoid
2. Cube
   Icosahedron

An ellipsoid is a three-dimensional figure whose plane sections are circles or ellipses. It differs from an ellipse in that all of its cross sections are circular while an ellipse is a closed curve.

1. Cube
   Sphere
2. Acute triangle
   Rhombus

An acute triangle is a type of triangle in which all the angles are less than 90 degrees. The acute triangle is also an oblique triangle – a triangle in which there no right or 90-degree angles.

1. Oval
   Cuboid
2. Tetrahedron
   Square

An oval is a type of curve in a plane which resembles the outline of an egg. Unlike many other curves, the oval is a closed circuit.

1. Triangular prism
   Ellipsoid
2. Cone
   Hexagon

A hexagon is a type of polygon which has six sides. If regular, each of its internal angles is equal to 120 degrees and together they add up to 720 degrees.

1. Equilateral triangle
   Cylinder
2. Trapezium
   Square-based pyramid

A trapezium is a quadrilateral which has no parallel sides. It differs from a trapezoid because while the trapezium does not have parallel sides, the trapezoid does.

1. Triangular prism
   Cylinder
2. Sphere
   Circle

A circle is a closed shape in which all points in the plane are the same distance from a fixed point, which is the center. The distance from the cent​er and any given point is known as its radius.

1. Rhombus
   Square
2. Cone
   Acute triangle

A square is a regular quadrilateral which is made up of four equal sides and four equal angles (90-degree angles). It can also be described as a type of rectangle whose adjacent sides are equal in length.

1. Pyramid
   Cube
2. Kite
   Crescent

A crescent is a circular disk with a portion of another circle being removed from the edge. The shape is representative of the lunar phase in the first quarter of the phases of the moon.

1. Tetrahedron
   Trapezium
2. Trapezoid
   Star

A star is an equilateral polygon which can be described as an equiangular polygon created by connecting one vertex of the polygon to the other. Most stars are seen with five points, but they can have any combination of numbers.

1. Sphere
   Hexagonal pyramid
2. Parallelogram
   Ellipse

A sphere is a three-dimensional completely rounded object whose distance from the center is the same at any given point or level. An example of this shape is planet Earth.

1. Icosahedron
   Dodecagon
2. Heart
   Rhombus

A dodecagon is a type of polygon which has 12 sides. Regular dodecagons have an internal angle of 150 degrees at each of the twelve vertices.

1. Concave hexagon
   Crescent
2. Octagon
   Circle

An octagon is an eight-sided polygon whose eight angles are also equal, making it a regular octagon. Irregular octagons are those in which neither the angles nor sides are equal.

1. Isoscles triangle
   Square
2. Acute triangle
   Icosahedron

An icosahedron is a type of polyhedron and three-dimensional shape that has 20 faces (or flat surfaces). Many of the enveloped viruses, including Hepatitis C and influenza, are examples of this shape.

1. Rectangle
   Heart
2. Obtuse triangle
   Circle

A heart is a shape which can be described as having two equal curves connected by a cusp at the top and the other two points meet at the bottom. This shape is often used to express affection and love.

1. Annulus
   Heart
2. Scalene triangle
   Pentagon

An annulus is a circular shape in which two concentric circles are bound in a region. The word annulus is also used to refer to the shape of a hardware washer.