The only regular (all sides equal and all angles equal) quadrilateral is a square.

What shapes have all sides congruent?

The square is also the name of the regular quadrilateral — one in which all sides are congruent and all angles are congruent.

What do you call the shape that has two equal sides?

In geometry, an isosceles triangle is a triangle that has two sides of equal length. Sometimes it is specified as having exactly two sides of equal length, and sometimes as having at least two sides of equal length, the latter version thus including the equilateral triangle as a special case.

What’s a 10 sided shape?

decagon
Answer (1 of 25): A ten sided object (polyhedron) is known as a decahedron (three dimensional) while a ten sided two dimensional figure (polygon) is known as a decagon.

What kind of shape has 4 equal sides?

SQUARE Flat 2D shape with 4 equal sides, and 4 interior right angles. RECTANGLE Formed by 2 sets of parallel lines, also containing 4 interior angles. Square is a type of rectangle. PARALLELOGRAM Like the rectangle, a parallelogram has 2 pairs of parallel sides, the rectangle and square are actually a type of parallelogram. TRIANGLE

What’s the name of a regular shape in 2D?

Regular shapes in 2D, are closed shapes where all sides and inside angles are the same size. These shapes are called Polygons, some examples of which are shown below. However, all the Polygon shapes below can also have irregular forms, where all the sides and inside angles are not equal in size.

What kind of shape has three sides and three angles?

A triangle has three sides and three angles. All the sides and angles can be different sizes. There are different types of triangles. The triangle shown is an equilateral triangle, which has all three sides equal in length and all three angles equal.

What are the names of shapes in math?

This page contains a list of some of the most common shapes and names of shapes encountered in Math. It’s important to be able to recognise a range of 2D and 3D shapes. 2D Shapes SQUARE Flat 2D shape with 4 equal sides, and 4 interior right angles. RECTANGLE Formed by 2 sets of parallel lines, also containing 4 interior angles.