Flat shapes are two-dimensional figures that have length and width but no thickness or depth. They come in many forms, including circles, squares, triangles, rectangles, ovals, pentagons, and hexagons, each having different sides, corners, and properties. Learning the names of flat shapes is a useful way to improve English vocabulary while developing a basic understanding of geometry and everyday objects. In this article, you will learn flat shape names in English with clear pictures, helping kids, students, teachers, beginners, and English learners easily identify, understand, compare, remember, and use these common shape names with confidence.
List of Flat Shapes Names in English
- Circle
- Oval
- Ellipse
- Triangle
- Square
- Rectangle
- Pentagon
- Hexagon
- Heptagon
- Octagon
- Nonagon
- Decagon
- Undecagon
- Dodecagon
- Rhombus
- Parallelogram
- Trapezoid
- Kite
- Semicircle
- Quarter Circle
Flat Shapes Names in English with Pictures
- Circle
A circle is a flat shape with every point on its boundary equally distant from its center.
- Oval
An oval is a rounded flat shape that is longer in one direction and has no corners.
- Ellipse
An ellipse is a curved flat shape with a smooth, stretched appearance and two main axes.
- Triangle
A triangle is a flat shape with three straight sides, three corners, and three interior angles.
- Square
A square is a flat shape with four equal sides and four right angles.
- Rectangle
A rectangle is a flat shape with four right angles and opposite sides equal in length.
- Pentagon
A pentagon is a flat shape with five straight sides, five corners, and five interior angles.
- Hexagon
A hexagon is a flat shape with six straight sides, six corners, and six interior angles.
- Heptagon
A heptagon is a flat shape with seven straight sides, seven corners, and seven interior angles.
- Octagon
An octagon is a flat shape with eight straight sides, eight corners, and eight interior angles.
- Nonagon
A nonagon is a flat shape with nine straight sides, nine corners, and nine interior angles.
- Decagon
A decagon is a flat shape with ten straight sides, ten corners, and ten interior angles.
- Undecagon
An undecagon is a flat shape with eleven straight sides, eleven corners, and eleven interior angles.
- Dodecagon
A dodecagon is a flat shape with twelve straight sides, twelve corners, and twelve interior angles.
- Rhombus
A rhombus is a four-sided flat shape with four equal sides and opposite sides parallel.
- Parallelogram
A parallelogram is a four-sided flat shape with both pairs of opposite sides parallel.
- Trapezoid
A trapezoid is a four-sided flat shape with at least one pair of parallel opposite sides.
- Kite
A kite is a four-sided flat shape with two pairs of equal adjacent sides.
- Semicircle
A semicircle is half of a circle, formed by a curved edge and one straight diameter.
- Quarter Circle
A quarter circle is one-fourth of a circle, bounded by two perpendicular radii and one curved edge.
Flat Shapes Names in English with Pictures
40 Flat Shape Name in English
- Crescent
- Heart
- Star
- Cross
- Arrow
- Diamond
- Sector
- Annulus
- Ring
- Circular Segment
- Regular Polygon
- Irregular Polygon
- Convex Polygon
- Concave Polygon
- Equilateral Triangle
- Isosceles Triangle
- Scalene Triangle
- Right Triangle
- Acute Triangle
- Obtuse Triangle
Basic Flat Shapes Names with Pictures
- Crescent
A crescent is a curved flat shape resembling a thin moon, with two pointed ends and a rounded outer edge.
- Heart
A heart is a flat shape with two rounded upper curves, a pointed bottom, and a familiar heart-like appearance.
- Star
A star is a flat shape with several pointed arms extending outward from its center.
- Cross
A cross is a flat shape formed by two straight bars crossing at their centers.
- Arrow
An arrow is a flat shape with a pointed head and a shaft showing a particular direction.
- Diamond
A diamond is a four-sided flat shape with four equal sides and opposite angles equal.
- Sector
A sector is a part of a circle enclosed by two radii and the curved arc between them.
- Annulus
An annulus is a flat ring-shaped region between two circles sharing the same center.
- Ring
A ring is a flat circular shape with a hole in the middle and curved outer and inner boundaries.
- Circular Segment
A circular segment is a flat region enclosed by an arc and a straight chord of a circle.
- Regular Polygon
A regular polygon is a flat shape with equal sides and equal interior angles throughout its boundary.
- Irregular Polygon
An irregular polygon is a flat shape whose sides or interior angles are not all equal.
- Convex Polygon
A convex polygon is a flat shape where every interior angle is less than 180 degrees.
- Concave Polygon
A concave polygon is a flat shape with at least one interior angle greater than 180 degrees.
- Equilateral Triangle
An equilateral triangle is a three-sided flat shape with three equal sides and three equal angles.
- Isosceles Triangle
An isosceles triangle is a three-sided flat shape with at least two equal sides.
- Scalene Triangle
A scalene triangle is a three-sided flat shape with three sides of different lengths.
- Right Triangle
A right triangle is a three-sided flat shape containing exactly one angle measuring 90 degrees.
- Acute Triangle
An acute triangle is a three-sided flat shape where all three interior angles measure less than 90 degrees.
- Obtuse Triangle
An obtuse triangle is a three-sided flat shape containing exactly one interior angle greater than 90 degrees.
Basic Flat Shapes Names with Pictures
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