Rectangles and Parallelograms Calculator

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Enter 2 values below

A rectangle has length x width of 21 x 5

Calculate the perimeter and area

Calculate Area (A):

A = l x w
where l = length and w = width

Plug in l = 21 and w = 5

A = 21 x 5

A = 105

Calculate Perimeter (P):

P = 2(l + w)
where l = length and w = width

Plug in l = 21 and w = 5

P = 2 * (21 + 5)

P = 2 * 26

P = 52

Calculate diagonal length

Diagonal = √l² + w²
where l = length and w = width

Plug in l = 21 and w = 5

Diagonal = √21² + 5²

Diagonal = √441 + 25

Diagonal = √466

Diagonal = 21.587033144923

Calculate the circumradius R:

R =	√l² + w²
	2

R =	√21² + 5²
	2

R =	√441 + 25
	2

R =	√466
	2

R =	21.587033144923
	2

R = 10.793516572461

r =	105
	26

Calculate the inradius r:

r =	lw
	l + w

r =	(21)(5)
	21 + 5

r =	105
	26

r = 4.0384615384615

Other Properties:

Faces = 1

Edges = 4

Vertices = 4

Final Answers

l = 21
w = 5
A = 105
P = 52
Diagonal = 21.587033144923
R = 10.793516572461
r = 4.0384615384615
Faces = 1
Edges = 4
Vertices = 4

You have 1 free calculations remaining

What is the Answer?

l = 21
w = 5
A = 105
P = 52
Diagonal = 21.587033144923
R = 10.793516572461
r = 4.0384615384615
Faces = 1
Edges = 4
Vertices = 4

How does the Rectangles and Parallelograms Calculator work?

Free Rectangles and Parallelograms Calculator - Solve for Area, Perimeter, length, and width of a rectangle or parallelogram and also calculates the diagonal length as well as the circumradius and inradius.
This calculator has 4 inputs.

What 2 formulas are used for the Rectangles and Parallelograms Calculator?

What 9 concepts are covered in the Rectangles and Parallelograms Calculator?

area: Number of square units covering the shape
circumradius: a radius of the circle inside which the polygon can be inscribed
inradius: a radius of an inscribed circle or sphere
length: the measurement or extent of something from end to end
parallelogram: simple quadrilateral with two pairs of parallel sides.
perimeter: The distance around a shape or object
rectangle: a quadrilateral with four right angles
rectangles and parallelograms
width: the measurement or extent of something from side to side.

Example calculations for the Rectangles and Parallelograms Calculator