Geometry

Area of a circle calculator

Area of a circle calculator - calculating area of a circle online. Area of a circle - is a numerical characteristic that characterizes the size of a plane bounded by a circle line. Area of a circle can be calculated using the number pi and the radius of the circle, or using other known input data.

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Circle area through diameter D - diameter

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Area of a circle along the circumference - circumference
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Area of a circle through a square inscribed in a circle a - side

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Area of the circle inscribed in a square A - side

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Area of the circle described around an arbitrary triangle This formula is applicable only if a circle can be described around a triangle, that is, all three vertices of the triangle must lie on the line of the circle. The triangle in this case can be any.

To calculate the area of a circle, first calculate the semi-perimeter of a triangle

a - side
b - side
c - side
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Area of a circle described near an equilateral triangle a - side

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Area of a circle described around an equilateral triangle, calculated from the height of the triangle h - height

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Area of a circle about an isosceles triangle a - side
b - base

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Area of the circle described about a right triangle a - side
b - side

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Area of a circle inscribed in an isosceles triangle a - side
b - base

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Area of a circle inscribed in an isosceles triangle, calculated on the sides of the triangle and the angle between them b - side
α - angle between parties

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Area of a circle inscribed in a right triangle a - side
b - side
c - side

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Area of a circle inscribed in a right triangle, calculated by the side and angle b - side
α - angle at base

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Area of a circle inscribed in an equilateral triangle a - side

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Area of a circle inscribed in an isosceles trapezium, calculated from the base of the trapezium and the angle at the base b - side
α - angle at base

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Area of a circle described near an isosceles trapezium, calculated along the sides of the trapezium, its diagonal and base To calculate the area of a circle, first calculate the semi-perimeter of a triangle ABC

a - side
c - side
d - diagonal
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Area of the circle described near the rectangle a - side
b - side

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Area of a circle described near a regular polygon a - side
N - the number of sides of the polygon

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Area of a circle described about a regular hexagon a - side

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