A rectangle has length x width of 20 x 9
Calculate the perimeter and area
Calculate Area (A):
A = l x w
where l = length and w = width
Plug in l = 20 and w = 9
A = 20 x 9
A = 180
Calculate Perimeter (P):
P = 2(l + w)
where l = length and w = width
Plug in l = 20 and w = 9
P = 2 * (20 + 9)
P = 2 * 29
P = 58
Calculate diagonal length
Diagonal = √l2 + w2
where l = length and w = width
Plug in l = 20 and w = 9
Diagonal = √202 + 92
Diagonal = √400 + 81
Diagonal = √481
Diagonal = 21.931712199461
Calculate the circumradius R:
| R = | √l2 + w2 |
| 2 |
| R = | √202 + 92 |
| 2 |
| R = | √400 + 81 |
| 2 |
| R = | √481 |
| 2 |
| R = | 21.931712199461 |
| 2 |
R = 10.965856099731
| r = | 180 |
| 29 |
Calculate the inradius r:
| r = | lw |
| l + w |
| r = | (20)(9) |
| 20 + 9 |
| r = | 180 |
| 29 |
r = 6.2068965517241
Other Properties:
Faces = 1
Edges = 4
Vertices = 4
Final Answers
l = 20
w = 9
A = 180
P = 58
Diagonal = 21.931712199461
R = 10.965856099731
r = 6.2068965517241
Faces = 1
Edges = 4
Vertices = 4
w = 9
A = 180
P = 58
Diagonal = 21.931712199461
R = 10.965856099731
r = 6.2068965517241
Faces = 1
Edges = 4
Vertices = 4
Common Core State Standards In This Lesson
4.MD.A.3
What is the Answer?
l = 20
w = 9
A = 180
P = 58
Diagonal = 21.931712199461
R = 10.965856099731
r = 6.2068965517241
Faces = 1
Edges = 4
Vertices = 4
w = 9
A = 180
P = 58
Diagonal = 21.931712199461
R = 10.965856099731
r = 6.2068965517241
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.
