Definition:
The total distance around the outside of a
trapezoid

Try this
Drag any orange dot to resize the trapezoid. The perimeter is calculated as you drag.

Like any polygon, the perimeter is the total distance around the outside, which can be found by adding together the length of each side. Or as a formula:

perimeter = a+b+c+d | |

where: | |

a,b,c,d | are the lengths of each side |

In the figure above, drag any orange dot to resize the trapezoid. From the side lengths shown, calculate the perimeter and verify your result matches the formula at the top of the diagram.

- In the figure above, click on "hide details".
- Drag the four orange dots to reshape the trapezoid.
- Calculate the perimeter.
- Click "Show details" to check your answer.

- Polygon general definition
- Quadrilateral
- Regular polygon
- Irregular polygon
- Convex polygons
- Concave polygons
- Polygon diagonals
- Polygon triangles
- Apothem of a regular polygon
- Polygon center
- Radius of a regular polygon
- Incircle of a regular polygon
- Incenter of a regular polygon
- Circumcircle of a polygon
- Parallelogram inscribed in a quadrilateral

- Square
- Diagonals of a square
- Rectangle
- Diagonals of a rectangle
- Golden rectangle
- Parallelogram
- Rhombus
- Trapezoid
- Trapezoid median
- Trapezium
- Kite
- Inscribed (cyclic) quadrilateral

- Regular polygon area
- Irregular polygon area
- Rhombus area
- Kite area
- Rectangle area
- Area of a square
- Trapezoid area
- Parallelogram area

- Perimeter of a polygon (regular and irregular)
- Perimeter of a triangle
- Perimeter of a rectangle
- Perimeter of a square
- Perimeter of a parallelogram
- Perimeter of a rhombus
- Perimeter of a trapezoid
- Perimeter of a kite

- Exterior angles of a polygon
- Interior angles of a polygon
- Relationship of interior/exterior angles
- Polygon central angle

- Tetragon, 4 sides
- Pentagon, 5 sides
- Hexagon, 6 sides
- Heptagon, 7 sides
- Octagon, 8 sides
- Nonagon Enneagon, 9 sides
- Decagon, 10 sides
- Undecagon, 11 sides
- Dodecagon, 12 sides

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