Triangle area using height and base

Triangle area using two sides and the angle between them

Tringle area using three sides (Heron's formula)

Triangle area using semiperimeter and inradius

Triangle area using three sides and circumradius

Right triangle area

Equilateral triangle area

Area of a square

Area of a square using diagonal

Area of a rectangle

Area of a rectangle using diagonal

Area of a parallelogram

Area of a parallelogram using two sides

Area of a parallelogram using diagonals

Area of a rhombus

Area of a rhombus using diagonals

Area of a cyclic quadrilateral

Area of a trapezium (trapezoid)

Area of a trapezium (trapezoid) using midline

Area of a regular polygon inside circumcircle

Area of a regular polygon

Area of an equilateral triangle using circumradius

Area of an equilateral triangle using inradius

Area of an equilateral triangle using height

Area of a square using circumradius

Area of a square using inradius

Area of a regular hexagon

Area of a regular hexagon using circumradius

Area of a regular hexagon using inradius

Area of a circle

Area of sector of a circle

Area of sector of a circle using angle

Area of a smaller segment of a circle

Area of a bigger segment of a circle

Area of a segment of a circle

a - side (base)

h - triangle height

h - triangle height

Find
It is known that:

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Triangle area using two sides and the angle between them

a, b - sides

C - angle between a and b

C - angle between a and b

Find
It is known that:

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Tringle area using three sides (Heron's formula)

a, b, c - sides

p - half perimeter (semiperimeter)

p - half perimeter (semiperimeter)

Find
It is known that:

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Triangle area using semiperimeter and inradius

p - half perimeter (semiperimeter)

r - inradius

r - inradius

Find
It is known that:

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Triangle area using three sides and circumradius

a, b, c - sides

R - circumradius

R - circumradius

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It is known that:

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Right triangle area

a, b - legs (sides)

Find
It is known that:

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Equilateral triangle area

Find
It is known that:

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Area of a square

a - side

Find
It is known that:

=

Area of a square using diagonal

d - diagonal

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It is known that:

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Area of a rectangle

a,b - sides

Find
It is known that:

=

Area of a rectangle using diagonal

d - diagonal

φ - angle between diagonals

φ - angle between diagonals

Find
It is known that:

=

Area of a parallelogram

a - base

h - height

h - height

Find
It is known that:

=

Area of a parallelogram using two sides

a, b - sides

α - angle between a and b

α - angle between a and b

Find
It is known that:

=

Area of a parallelogram using diagonals

d1, d2 - diagonals

φ - angle between diagonals

φ - angle between diagonals

Find
It is known that:

=

Area of a rhombus

a - side

α - angle between sides

α - angle between sides

Find
It is known that:

=

Area of a rhombus using diagonals

d1, d2 - diagonals

Find
It is known that:

=

Area of a cyclic quadrilateral

a, b, c, d - sides

p - half perimeter (semiperimeter)

p - half perimeter (semiperimeter)

Find
It is known that:

=

Area of a trapezium (trapezoid)

a, b - bases of a trapezoid

h - trapezoid height

h - trapezoid height

Find
It is known that:

=

Area of a trapezium (trapezoid) using midline

m - trapezoid midline

h - trapezoid height

h - trapezoid height

Find
It is known that:

=

Area of a regular polygon inside circumcircle

R - radius of circumcircle (long radius)

n - number of angles or sides

n - number of angles or sides

Find
It is known that:

=

Area of a regular polygon

r - inradius

a - side

n - knumber of angles or sides

a - side

n - knumber of angles or sides

Find
It is known that:

=

Area of an equilateral triangle using circumradius

R - circumradius

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It is known that:

=

Area of an equilateral triangle using inradius

r - inradius

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It is known that:

=

Area of an equilateral triangle using height

h - height of triangle

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It is known that:

=

Area of a square using circumradius

R - circumradius

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It is known that:

=

Area of a square using inradius

r - inradius

Find
It is known that:

=

Area of a regular hexagon

a - side of a hexagon

Find
It is known that:

=

Area of a regular hexagon using circumradius

R - circumradius

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It is known that:

=

Area of a regular hexagon using inradius

r - inradius

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It is known that:

=

Area of a circle

R - radius

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It is known that:

=

Area of sector of a circle

R - radius

l - arc length

l - arc length

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It is known that:

=

Area of sector of a circle using angle

R - radius

α - central angle

α - central angle

Find
It is known that:

=

Area of a smaller segment of a circle

R - radius

α - central angle

α - central angle

Find
It is known that:

=

Area of a bigger segment of a circle

R - radius

α - central angle

α - central angle

Find
It is known that:

=

Area of a segment of a circle

R - radius

α - central angle

α - central angle

Find
It is known that:

=