## Related words

### the Cross

noun a shape with one long upright line and one shorter line across it, used as a symbol of Christianity

### cube

noun an object like a box with six square sides that are all the same size

### cuboid

noun a shape like a box that is similar to a cube, but with surfaces that are rectangles, not squares

### diamond

noun a shape with four straight equal sides that stands on one of its corners

### equilateral triangle

noun a triangle whose sides are all the same length

### flare

noun a shape that becomes wider at one end

### heptagon

noun a geometric shape with seven straight sides. Something in the shape of a heptagon is heptagonal.

### hexagon

noun a geometric shape with six straight sides. Something in the shape of a hexagon is hexagonal.

### hexagram

noun a star with six points that is made from two triangles

### horn

noun an object or shape that is narrow at one end and much wider at the other

### isosceles triangle

noun a triangle in which two sides are the same length

### lozenge

noun maths a shape with four sloping sides

### oblong

noun maths a shape with four straight sides and four 90º angles. Two of the parallel sides are longer than the other two sides.

### oblong

noun a shape that is longer than it is wide

### octagon

noun a shape with eight straight sides

### parallelogram

noun a shape with four straight sides in which opposite sides are of equal length and are parallel to each other

### peak

noun an object or shape that looks like the top of a mountain

### pentagon

noun a shape with five sides, usually of equal length, and angles greater than 90°

### pentagram

noun a star with five points that is often used as a magic symbol

### polygon

noun a flat shape with three or more sides and angles

### polyhedron

noun a solid shape with many flat sides

### prism

noun a solid object that has a regular shape and can be cut into slices that all have the same shape. A prism usually has two or more sides shaped like a triangle.

### pyramid

noun an object with the shape of a pyramid

### quad

noun informal a quadrangle

### quadrilateral

noun a flat shape with four sides such as a square

### rectangle

noun a shape with four straight sides and four angles of 90º

### rhombus

noun a shape with four straight sides of equal length and angles that are not 90°. The more usual word is diamond.

### right-angled triangle

noun British a flat shape with three straight sides and three angles, one of which is a right angle

### square

noun a shape with four straight sides of equal length and four corners called right angles

### star

noun an object or shape with five or more points that looks like a star

### starburst

noun a shape or pattern of lines coming out from a centre point like the rays of a star

### Star of David

noun a star with six points formed by putting a triangle upside down on top of another triangle. It is used to represent Judaism and the state of Israel.

### trapezium

noun British a shape with four straight sides, two of which are parallel. The American word is trapezoid.

### trapezoid

noun British a shape with four straight sides that are not parallel to each other. The American word is trapezium.

### triangle

noun maths a flat shape that has three straight sides and three angles

### triangle

noun something that has the shape of a triangle