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JEE Main 2026 Preparation: Question Papers, Solutions, Mock Tests & Strategy Unacademy » JEE Study Material » Mathematics » Circumscribed

Circumscribed

A form is circumscribed if it can only fit inside another shape. For the interior figure to pass the outer figure, there is no way around it. When we draw a figure around another figure, the outer figure contacts all of the inside figure's vertices but does not cross it. Without crossing the inside figure, the outer figure touches its maximum points.

Table of Content
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A form is circumscribed if it can only fit within another shape. The inside figure cannot travel through the outer figure since there is no bypass. When we draw a figure that surrounds another figure in such a way that the outer figure touches all of the interior figure’s vertices but does not cross it. The outside figure touches the interior figure’s maximum points without crossing it. A circle, a square, a triangle, a rectangle, or a quadrilateral are examples of geometrical shapes.

Every polygon does not contain a circumscribed circle. A cyclic polygon, or rarely a concyclic polygon, is a polygon with one vertical that is concyclic. Cyclic triangles, regular simple polygons, rectangles, isosceles trapezoids, and right kites are among the shapes available.

Circumscription and inscription are notions that can be extended to three (or more) dimensions. A cone, for example, can be circumscribed around a pyramid if the vertices of the cone and pyramid coincide, and the cone’s base circumscribes the pyramid’s base. The pyramid is written within the cone in this case. A sphere can be inscribed within a cylinder, for example, if all of the cylinder’s parts are tangent to the sphere’s surface. The cylinder is then wrapped around the sphere.

Any figure that encircles another figure is said to be drawn outside of that figure. However, the circumscribing figure must touch all of the inside figure’s vertices. If a circle circumscribes a pentagon, it must contact all five of the pentagon’s vertices. Circumscribed functions.

Various circumscribed shapes.

Any shape has the ability to encircle another shape.

Circumscribed circle:

A circumcircle refers to a circle drawn outside of any other shape, such as a polygon, that touches all of the polygon’s vertices.

Circumscribed triangle:

The circumscribed triangle is a triangle that is drawn on the outside of all other forms. If possible, it must touch all of the vertices.

Circumscribed pentagon

The circumscribed pentagon is a pentagon that has been drawn outside of any other shapes. If possible, it must touch all of the vertices.

Pentagons can be either regular or irregular in shape.

Circumscribed angle:

When the angle’s arms intersect the circle as tangents to the circle, the circumscribed angle is drawn.

Circumscribed Quadrilateral:

The quadrilateral drawn outside of any other shape is known as the circumscribed quadrilateral. If possible, it must touch all of the vertices.

Circumscribed hexagon:

A circumscribed hexagon is one that surrounds any geometrical figure such that all of the inner figure’s vertices contact the hexagon’s sides. A circumscribed hexagon of the circle is defined as a hexagon that surrounds a circle and has sides that are tangent to the circle.

Circumscribed rectangle:

A circumscribed rectangle is a rectangle that is drawn outside of any other forms. If possible, it must touch all of the vertices.

Circumscribed vs inscribed

In the below table describe the difference between Circumscribed vs inscribed

Circumcircle around a polygon refers to a circle that encircles the polygon. An incircle into a polygon is a circle that inscribes the polygon.

Circumscribed

Inscribed

The polygon is called an inscribed polygon and the circle is called the circumscribed circle if it is drawn in a circle with every corner of the polygon on the circle. In the diagram, O represents the polygon’s centre, while of represents the circumscribed circle’s radius, which is given by R.

When a polygon is drawn outside of a circle and all of its sides touch the circle, the polygon is known as a circumscribed polygon, and the circle is known as an inscribed circle. The radius of the inscribed is denoted by r in the diagram.

 

If the polygon is regular, the circle’s centre is also the polygon’s centre.

 

 

Conclusion

In conclusion, the term “circumscribed figure” refers to a figure that has been drawn around another figure. To be inscribed inside a circle, all of a polygon’s corners, also known as vertices, must touch it. The concepts of circumscription and inscription can be generalized to three (or more) dimensions. A cone can be circumscribed around a pyramid if the vertices of the cone and pyramid coincide, and the cone’s base circumscribes the pyramid’s base.

 
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Frequently Asked Questions

Get answers to the most common queries related to the JEE Examination Preparation.

What is the definition of a circumscribed triangle?

Ans. When a circle crosses through all three vertices of a triangle, it is called a circumscribed triangle. The circ...Read full

Which quadrilaterals have circles that are circumscribed?

Ans. Circumscribed circles are found in all cyclic convex quadrilaterals. Concave polygons, on the other hand, lack ...Read full

What is the difference between circumscribed and inscribed circles?

Ans. If the polygon’s vertices are on the circle, the circle circumscribes the polygon. The circle’s cen...Read full

What is the definition of a circumscribed rectangle?

Ans. The smallest rectangle that can be formed around a group of points such that all of the points are inside it, o...Read full

What is the definition of a circumscribed angle?

Ans. The angle formed by two intersecting tangent lines to a circle is known as a circumscribed angle.

Ans. When a circle crosses through all three vertices of a triangle, it is called a circumscribed triangle. The circumcenter of the circumscribed circle is the point where the perpendicular bisectors of the sides meet; this is the position where the perpendicular bisectors of the sides meet.

 

 

Ans. Circumscribed circles are found in all cyclic convex quadrilaterals. Concave polygons, on the other hand, lack circumscribed circles.

Ans. If the polygon’s vertices are on the circle, the circle circumscribes the polygon. The circle’s centre is the circumcenter of a triangle. If the sides of the polygon are tangential to the circle, the circle is inscribed as a polygon. The incenter of a triangle is the centre of the circle.

Ans. The smallest rectangle that can be formed around a group of points such that all of the points are inside it, or exactly on one of its sides, is known as the circumscribed rectangle, or bounding box. The rectangle’s four sides are always vertical or horizontal, parallel to the x or y-axis.

Ans. The angle formed by two intersecting tangent lines to a circle is known as a circumscribed angle.

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