What shape has a perimeter of 86 millimetres?

Answer 1

Any shape can have a perimeter of 86 mm.

Some examples are:

-- a scalene triangle with sides of 25, 30, and 31 mm

-- a square with 21.5 mm sides

-- an infinite number of different rectangles, like 2 x 43, 3 x 40, 4.1 x 38.9, 5 x 38, 21 x 22, etc.

-- a trapezoid with sides of 10, 30, 10, and 36 mm

-- a regular pentagon with sides of 17.2 mm

-- a regular hexagon with sides of 14-1/3 mm

-- a circle with diameter of (86/pi) mm