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
w = 5
A = 105
P = 52
Diagonal = 21.587033144923
R = 10.793516572461
r = 4.0384615384615
Faces = 1
Edges = 4
Vertices = 4
Keep Practicing
Common Core State Standards In This Lesson
4.MD.A.3
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
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.
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
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