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Perimeter of Geometric Shapes

The perimeter of geometric shapes is the length of the line defining the shape, or the distance around the shape.

For example, the perimeter of a rectangle is given by:

perimeter of geometric shapes

For polygons, it is the sum of the lengths of all the straight lines that make up the polygon.

For circles, the perimeter is called the circumference, and it is given by the formula C=2*r*π , where r is the circle's radius, and π is a special mathematical constant, which is not a rational number, roughly equal to 3.14159.

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Now that we've explained the basic concept of perimeter in geometry, let's scroll down to work on specific geometry problems relating to this topic.

Similar triangles in geometry

Applying the Scale Factor of Similar Triangles to the Perimeter

perimeter of a polygon

Perimeter of a Polygon

perimeter of rectangle

Perimeter of a Rectangle

Perimeter in Geometry

Perimeter of Geometric Shapes: Word Problems

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Welcome to Geometry Help! I'm Ido Sarig, a high-tech executive with a BSc degree in Computer Engineering and an MBA degree in Management of Technology. I'm here to tell you that geometry doesn't have to be so hard! My goal with this website is to help you develop a better way to approach and solve geometry problems, even if spatial awareness is not your strongest quality. Read More…

Geometry Topics

  • Area of Geometric Shapes
  • Circles
    • Arcs, Angles, and Sectors
    • Chords
    • Inscribed Shapes
    • Tangent Lines
  • Lines and Angles
    • Intersecting Lines and Angles
    • Parallel Lines
    • Perpendicular lines
  • Pentagons and Hexagons
  • Perimeter of Geometric Shapes
  • Polygons
  • Quadrangles
    • Kites (Deltoids)
    • Parallelograms
    • Rectangles
    • Rhombus
    • Squares
    • Trapezoids
  • Triangles
    • Congruent Triangles
    • Equilateral Triangles
    • Isosceles Triangles
    • Pythagorean Theorem
    • Right Triangles
    • Similar Triangles
    • Triangle Inequalities

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