Enter 2 values below
A rectangle has length x width of 8 x 5
Calculate the perimeter and area
Calculate Area (A):
A = l x w
where l = length and w = width
Plug in l = 8 and w = 5
A = 8 x 5
A = 40
Calculate Perimeter (P):
P = 2(l + w)
where l = length and w = width
Plug in l = 8 and w = 5
P = 2 * (8 + 5)
P = 2 * 13
P = 26
Calculate diagonal length
Diagonal = √l2 + w2
where l = length and w = width
Plug in l = 8 and w = 5
Diagonal = √82 + 52
Diagonal = √64 + 25
Diagonal = √89
Diagonal = 9.4339811320566
Calculate the circumradius R:
| R = | √l2 + w2 |
| 2 |
| R = | √82 + 52 |
| 2 |
| R = | √64 + 25 |
| 2 |
| R = | √89 |
| 2 |
| R = | 9.4339811320566 |
| 2 |
R = 4.7169905660283
| r = | 40 |
| 13 |
Calculate the inradius r:
| r = | lw |
| l + w |
| r = | (8)(5) |
| 8 + 5 |
| r = | 40 |
| 13 |
r = 3.0769230769231
Other Properties:
Faces = 1
Edges = 4
Vertices = 4
Final Answers
l = 8
w = 5
A = 40
P = 26
Diagonal = 9.4339811320566
R = 4.7169905660283
r = 3.0769230769231
Faces = 1
Edges = 4
Vertices = 4
w = 5
A = 40
P = 26
Diagonal = 9.4339811320566
R = 4.7169905660283
r = 3.0769230769231
Faces = 1
Edges = 4
Vertices = 4
Common Core State Standards In This Lesson
4.MD.A.3
What is the Answer?
l = 8
w = 5
A = 40
P = 26
Diagonal = 9.4339811320566
R = 4.7169905660283
r = 3.0769230769231
Faces = 1
Edges = 4
Vertices = 4
w = 5
A = 40
P = 26
Diagonal = 9.4339811320566
R = 4.7169905660283
r = 3.0769230769231
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?
P=2l+2w
A=l*w
A=l*w
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.
