Area and Perimeter Calculator
Find the Area and Perimeter of Circle, Square, Rectangle, Triangle, Kite, Rhombus, Pentagon, Hexagon, Parallelogram, Trapezoid, Octagon
Circle Area Calculator - Enter radius and calculate the circle area
Formula to Calculate Area and Perimeter of a Circle
Area of a Circle using Radius:
Area = πr²
r is radius and Pi value is 3.14
Radius of a Circle given its area:
Radius = square root (A / π)
A is area and Pi value is 3.14
Perimeter of a Circle using Radius:
Perimeter = 2πr
r is radius and Pi value is 3.14
Find the Radius of a Circle for a given Perimeter
Radius = square root (C / 2π)
C is Circumference or Perimeter and Pi value is 3.14
Formula to Calculate Area and Perimeter of a Sector
Area of a Sector using Radius:
Area =(θ/360°) x πr²
r is radius, Pi value is 3.14 and 𝜃 is the angle of the sector.
Perimeter of a Sector using radius:
Perimeter = 2r + ((θ/360) × 2πr )
r is radius, Pi value is 3.14 and 𝜃 is the angle of the sector.
Formula to Calculate Area and Perimeter of an Oval
Area of Oval:
Area = π(A + B)/2
A is Major Axis, B is Minor Axis and Pi value is 3.14
Perimeter of an Oval:
Perimeter = 2π square root((A² + B²)/2)
A is Major Axis, B is Minor Axis and Pi value is 3.14
Formula to Calculate Area and Perimeter of an Ellipse
Area of Ellipse:
Area = πAB
A is Major Axis, B is Minor Axis and Pi value is 3.14
Perimeter of an Ellipse:
Perimeter = π (A + B) (1 + 3h / 10 +square root( 4 - 3h))
A is Major Axis, B is Minor Axis , h is (A - B)² / (A + B )² and Pi value is 3.14
Formula to Calculate Area and Perimeter of a Rhombus
Area of a Rhombus:
Area = PQ / 2
P is Diagonal 1 and Q is Diagonal 2
Perimeter of a Rhombus:
Radius = 2 * square root (P² + Q²)/2
P is Diagonal 1 and Q is Diagonal 2
Formula to Calculate Area and Perimeter of a Parallelogram
Area of Parallelogram:
Area = ( b*h)
h is height and b is base
Perimeter of Parallelogram
Perimeter = 2(a + b)
a and b are the length of two adjacent sides of parallelogram
Formula to Calculate Area of a Square
Area of Square:
Area = a²
a is side
Find the Sides of a Square given its area
Side = Square Root (A)
A is area
Perimeter of Square:
Perimeter = 4a
a is side
Find Sides of a Square using Perimeter:
Side = P / 4
P is Perimeter
Formula to Calculate Area and Perimeter of a Rectangle
Area of a Rectangle:
Area = L * W
L is Length and W is Width
Perimeter of Rectangle:
Perimeter = 2 * (L + W)
L is Length and W is Width
Formula to Calculate Area and Perimeter of a Triangle
Area of Equilateral Triangle:
Area = square root (3)/4 a²
a is side
Area of Isosceles Triangle:
h = square root (a² - b²/4)
Area = bh
b is base and h is Height
Area of Scalene Triangle:
S = a + b + c / 2
Area = square root (s (s-a) (s-b) (s-c))
a, b and c are sides
Perimeter of Equilateral Triangle:
Perimeter = 3a
a is side
Perimeter of Isosceles Triangle:
Perimeter = 2a + b
b is base and a is side
Perimeter of Scalene Triangle:
Perimeter = a + b + c
a, b and c are sides
Formula to Calculate Area and Perimeter of a Trapezoid
Area of Trapezoid:
Area = 1/2 (a + b) h
a and b are axes and h is height
Perimeter of Trapezoid:
Perimeter = (a + h + b + h)
a and b are axes and h is height
Formula to Calculate Area and Perimeter of a Pentagon
Area of Pentagon:
Area = 1/4 square root(5 (5 + 2 square root(5)))a²
A is Side
Perimeter of Pentagon:
Perimeter = 5a
a is Side
Formula to Calculate Area and Perimeter of a Hexagon
Area of Hexagon:
Area = 3 * square root (3) /2 a²
a is side
Perimeter of Hexagon:
Perimeter = 6a
a is side
Formula to Calculate Area and Perimeter of an Octagon
Area of Octagon:
Area = 2(1 + square root (2))a²
a is Side
Perimeter of Octagon:
Perimeter = 8a
a is Side
Formula to Calculate Area and Perimeter of a Kite
Area of Kite:
Area = ab/2
a is diagonal 1 and b is diagonal 2
Perimeter of Kite:
Perimeter = 2(a + b)
a is diagonal 1 and b is diagonal 2
Frequently Asked Questions on Area Calculator
Area of a circle is πr² where r is radius and Pi value is 3.14
