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InsightHorizon Digest

What is the meaning of circumscribed and inscribed

Author

James Bradley

Updated on April 05, 2026

In summary, an inscribed figure is a shape drawn inside another shape. A circumscribed figure is a shape drawn outside another shape. For a polygon to be inscribed inside a circle, all of its corners, also known as vertices, must touch the circle.

What is the meaning of circumscribed and inscribed circles?

A circle is circumscribed about a polygon if the polygon’s vertices are on the circle. For triangles, the center of this circle is the circumcenter. A circle is inscribed a polygon if the sides of the polygon are tangential to the circle. For triangles, the center of this circle is the incenter.

What is the meaning of inscribed in circle?

In geometry, an inscribed planar shape or solid is one that is enclosed by and “fits snugly” inside another geometric shape or solid. … A polygon inscribed in a circle is said to be a cyclic polygon, and the circle is said to be its circumscribed circle or circumcircle.

What do you mean by circumscribed?

circumscribe \SER-kum-skrybe\ verb. 1 a : to constrict the range or activity of definitely and clearly. b : to define or mark off carefully. 2 a : to draw a line around. b : to surround by or as if by a boundary.

What is circumscribed in a circle?

In geometry, the circumscribed circle or circumcircle of a polygon is a circle that passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius.

What is the meaning of circumscribed in mathematics?

The meaning of circumscribed in Geometry is drawing a figure around another figure in such a way that the drawn figure touches the outer line or points of the inside figure without intersecting it.

What does the word inscribed mean?

1 : to write, engrave, or print as a lasting record His name is inscribed on the monument. 2 : to write, engrave, or print something on or in inscribe a book. inscribe. transitive verb.

What is the opposite of circumscribe?

circumscribe. Antonyms: expand, dilate, dissipate, disenclose, distend. Synonyms: define, designate, delineate, limit, enclose, confine, restrict, fence.

When a square is inscribed in a circle?

When a circle is inscribed in a square, the length of each side of the square is equal to the diameter of the circle. That is, the diameter of the inscribed circle is 8 units and therefore the radius is 4 units. The area of a circle of radius r units is A=πr2 .

What is circumscribed triangle?

Given a triangle, the circumscribed circle is the circle that passes through all three vertices of the triangle. The center of the circumscribed circle is the circumcenter of the triangle, the point where the perpendicular bisectors of the sides meet.

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What shapes can be circumscribed?

  • Triangle circumscribing square. Circumscribed Pentagon. …
  • Pentagon circumscribing circle. Circumscribed Angle. …
  • Angle circumscribing circle. Circumscribed Quadrilateral. …
  • Quadrilateral circumscribing triangle. Circumscribed Hexagon. …
  • Hexagon circumscribing circle. Circumscribed Rectangle.

What is a circumscribed angle?

A circumscribed angle is the angle made by two intersecting tangent lines to a circle. A tangent line is a line that touches a curve at one point. … This angle is equal to the arc angle between the two tangent points on the circumference of the circle.

What are inscribed triangles?

An inscribed triangle is a triangle inside a circle. To draw an inscribed triangle, you first draw your triangle. Then you draw perpendicular bisectors for each side of the triangle. Where they meet is the center of your circle.

What is inscribed mean in geometry?

A geometric figure which touches only the sides (or interior) of another figure.

When a circle is inscribed in a triangle?

A circle is inscribed in the triangle if the triangle’s three sides are all tangents to a circle. In this situation, the circle is called an inscribed circle, and its center is called the inner center, or incenter.

What is inscription with example?

An inscription is writing carved into something made of stone or metal, for example a gravestone or medal. Above its doors was a Latin inscription: Non omnia possumus omnes. The medal bears the inscription ‘For distinguished service’. Synonyms: engraving, words, lettering, label More Synonyms of inscription. 2.

What do you mean by abruptly?

Definition of abruptly : in an abrupt manner : in a sudden and unexpected way He left abruptly. The car swerved abruptly onto the exit ramp.

What does inscribed mean in a book?

Inscribed Books An inscription is a short note written by the previous owner, or, in some cases, the author, in the beginning of a book. While an inscription is generally accompanied by a signature, a “signed” book specifically denotes the author’s signature, as in an autograph.

Can a circle be inscribed or circumscribed about any irregular polygon?

Most, the vast majority, can neither circumscribe a circle nor be inscribed a circle. b. Some can be inscribed in a circle, but cannot circumscribe a circle.

What is the area of the largest triangle that is inscribed in a semicircle of radius R unit?

The area of the largest triangle that can be inscribed in a semi-circle of radius ‘r’ is: r2. 2r2.

What is a inscribed square?

A square is inscribed in a circle or a polygon if its four vertices lie on the circumference of the circle or on the sides of the polygon.

What does it mean for a square to be inscribed in another square?

The definition of an “inscribed” square in a square is that all of the smaller square’s vertices lies on the boundaries of the larger square. Notice that for this to happen, the smaller square’s vertices will divide each side of the larger square into two segments, the same on each side.

What is the ratio of the areas of inscribed and circumscribed circles of a square?

Let the side of the square inscribed in a square be a units. Hence, the required ratio is 2 : 1.

What is the antonym of inscription?

noun. ( ˌɪnˈskrɪpʃən) The activity of inscribing (especially carving or engraving) letters or words. Antonyms. inactivity competition infidelity unfaithfulness. superscription committal to writing.

How do you use circumscribe in a sentence?

  1. When my husband drinks too much, I hide his car keys to circumscribe his capacity to drive.
  2. A tall electric fence was constructed outside the prison to circumscribe prison escapes.

What is circumscribed polygon?

In Euclidean geometry, a tangential polygon, also known as a circumscribed polygon, is a convex polygon that contains an inscribed circle (also called an incircle). This is a circle that is tangent to each of the polygon’s sides. … All triangles are tangential, as are all regular polygons with any number of sides.

What is an Inradius?

Definition of inradius : a radius of an inscribed circle or sphere —opposed to exradius.

How do you find the inscribed circle of a triangle?

Given A, B, and C as the sides of the triangle and A as the area, the formula for the radius of a circle circumscribing a triangle is r = ABC / 4A and for a circle inscribed in a triangle is r = A / S where S = (A + B + C) / 2.

What is Max inscribed?

These methods are defined as follows [2][4]. – Maximum inscribed circle (MIC): It is defined as the largest circle that can be inscribed inside the roundness profile. The roundness error here again is the maximum deviation of the profile from this inscribed circle.

What polygons can be inscribed in a circle?

All regular polygons can be inscribed in a circle. The center of an inscribed polygon is also the center of the circumscribed circle. The radius of the inscribed polygon is also the radius of the circumscribed circle.

What is the inscribed angle formula?

Inscribed Angle Theorem: The measure of an inscribed angle is half the measure of the intercepted arc. That is, m∠ABC=12m∠AOC. This leads to the corollary that in a circle any two inscribed angles with the same intercepted arcs are congruent.