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This is a list of two-dimensional geometric shapes in Euclidean and other geometries. For mathematical objects in more dimensions, see list of mathematical shapes. For a broader scope, see list of shapes.
Geometrical shapes are all around us. They make up the form and structure of every two-dimensional (2D) and three-dimensional (3D) object. In mathematics—namely geometry—and in real life, geometric shapes are two or three-dimensional figures that can be recognized and categorized based on a specific outline/boundary and other attributes including curves, lines, and angles.
Scalene Triangle. Scalene triangles have no angles equal, and no sides of equal length. Right Triangle. Right triangles (or right angled triangles) have one right angle (equal to 90° ). Obtuse Triangle. Obtuse triangles have one obtuse angle (an angle greater than 90° ). The other two angles are acute (less than 90° ). Acute Triangle
A 3-D shape composed out of straight lines and flat 2-D surfaces is called polyhedra. like polygons, polyhedra are further divided by the number of faces. Convex shapes made out of curved lines are typically called ellipsoids but there are many other shapes that do not clearly fall into any one category. List of Geometric Shapes And Names Polygons
- Alexander Bolano
- 2018
All the 2 dimensional shapes have sides, vertices (corners), and interior angles, except for the circle, which is a curved figure. 2D shapes with at least three straight sides are called polygons and these include triangles, squares, and quadrilaterals. The figure given below shows a list of 2D shapes that we commonly come across.
A triangle’s internal angles sum to 180 degrees. Acute triangles have angles that are all less than 90 degrees. One side of a right triangle is 90 degrees in angle. One of the angles of obtuse triangles is greater than 90 degrees. What are examples of curved shapes? Curved shapes are geometrical shapes that are made out of curved lines and ...
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Probably the most common two-dimensional curved shape is a circle. In order to work with circles (and other curved shapes) in geometry it is important to understand the key properties of a circle: A line straight across the centre of a circle is the diameter. Half of the diameter is the radius. The line around the edge of a circle is the ...
