![]() Regular pentagon: A pentagon has five equal sides and five equal angles (108 degrees each).There are different types of pentagons based on their sides and angles: The sum of the angles in any pentagon is always 540 degrees. Pentagon: A pentagon is a five-sided shape with five vertices and five angles.Obtuse triangle: A triangle with one obtuse angle and two acute angles.Acute triangle: A triangle that has three acute angles.Right triangle: A triangle with one right angle and two acute angles.Scalene triangle: A triangle that has no equal sides or angles.Isosceles triangle: A triangle with two equal sides and two equal angles opposite them.Equilateral triangle: A triangle with three equal sides and three equal angles (60 degrees each).There are different types of triangles based on their sides and angles: The sum of the angles in any triangle is always 180 degrees. Triangle: A triangle is a three-sided shape with three vertices and angles.A rectangle can be a square if all its sides are equal. Rectangle: A rectangle is a four-sided shape with two pairs of equal sides and four right angles.A square is a special type of rectangle that has all equal sides. Square: A square is a four-sided shape with four equal sides and four right angles.The distance around the circle is called the circumference. The distance across the circle through the center is called the diameter. The distance from the center to any point on the circle is called the radius. It has one curved line that is always the same distance from the center. Circle: A circle is round with no sides or vertices.There are many types of 2D shapes, but here are some of the most common ones that you will encounter in our free printable 3rd Grade 2D shapes worksheets math practice: Types of 2D Shapes and their Properties.Some shapes have both parallel and perpendicular sides. Some shapes have parallel sides (always the same distance apart), while others have perpendicular sides (meet at right angles). Some shapes have equal sides (all the same length), while others have unequal sides (different lengths). There are three types of angles: acute (less than 90 degrees), right (exactly 90 degrees), and obtuse (more than 90 degrees). An angle is the amount of turn between two sides. A vertex (plural: vertices) is a point where two or more sides meet. ![]() A side is a straight or curved line that forms the edge of a shape. To identify a 2D shape, you need to look at its features, such as: ![]() You can draw a 2D shape on paper or a screen.
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