- Area of triangle
- ･Area of an equilateral triangle Calculate the area of an equilateral triangle by specifying the length of one side.
- ･Area of triangle (base and height) Calculate the area of the triangle from the base and height.
- ･Area of triangle (angle between two sides) Calculate the area of the triangle from the angle between the two sides.
- ･Area of triangle (angle of one side and both ends) Calculate the area of a triangle from the angles of one side and both ends.
- ･Area of triangle (length of 3 sides) Calculate the area of the triangle from the length of the three sides.

- Area of quadrilateral
- ･Area of a square Calculate the area of a square from the length of one side.
- ･Area of rectangle Calculate the area of the rectangle from the vertical and horizontal lengths.
- ･Area of trapezoid Calculate the area of the trapezoid from the top, bottom, and height using the formula.
- ･Area of rhombus Calculate the area of the rhombus from the length of the diagonal.
- ･Area of parallelogram (base and height) Calculate the area of a parallelogram from the base and height.
- ･Area of parallelogram (angle between two sides) Calculate the area of a parallelogram from the two sides and the angle between them.
- ･Area of quadrilateral (4 sides and sum of opposite angles) Calculate the area of a quadrilateral from the length of four sides and the sum of opposite angles.

- Area of a circle and fan shape
- ･Area of a circle Calculate the area of the circle and the perimeter from the radius.
- ･Area of fan shape Calculate the area of the sector, the length of the arc, and the length of the chord from the radius and central angle.
- ･Area of bow shape Calculate the area of the bow, the length of the arc, and the length of the chord from the radius and central angle.

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- Area Calculator

## Area Calculator

- ･Area of an equilateral triangle
- ･Area of triangle (base and height)
- ･Area of triangle (angle between two sides)
- ･Area of triangle (angle of one side and both ends)
- ･Area of triangle (length of 3 sides)
- ･Area of a square
- ･Area of rectangle
- ･Area of trapezoid
- ･Area of rhombus
- ･Area of parallelogram (base and height)
- ･Area of parallelogram (angle between two sides)
- ･Area of quadrilateral (4 sides and sum of opposite angles)
- ･Area of a circle
- ･Area of fan shape
- ･Area of bow shape