# What is the center of an inscribed circle?

Table of Contents

## What is the center of an inscribed circle?

The center point of the inscribed circle is called the “incenter.” The incenter will always be inside the triangle.

## Does a polygon inscribed in a circle have to be regular?

Every circle has an inscribed regular polygon of n sides, for any n≥3, and every regular polygon can be inscribed in some circle (called its circumcircle). Not every polygon with more than three sides has an inscribed circle; those polygons that do are called tangential polygons.

## What is an inscribed polygon?

An inscribed polygon might refer to any polygon which is inscribed in a shape, especially: A cyclic polygon, which is inscribed in a circle (the circumscribed circle) A midpoint polygon of another polygon.

## Can a circle be circumscribed about the quadrilateral?

If you’re given a convex quadrilateral, a circle can be circumscribed about it if and only the quadrilateral is cyclic. A nice fact about cyclic quadrilaterals is that their opposite angles are supplementary.

## What’s the difference between circumscribed and inscribed?

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 polygons can be circumscribed by a circle?

Not every polygon has a circumscribed circle. A polygon that does have one is called a cyclic polygon, or sometimes a concyclic polygon because its vertices are concyclic. All triangles, all regular simple polygons, all rectangles, all isosceles trapezoids, and all right kites are cyclic.

## What are the opposite angles in a cyclic quadrilateral?

The opposite angles in a cyclic quadrilateral are supplementary. i.e., the sum of the opposite angles is equal to 180˚.

## Is every parallelogram a cyclic quadrilateral?

Parallelogram: Any parallelogram cannot be cyclic because if any quadrilateral is cyclic, then the sum of the opposite angles must be 180°. But in the case of a parallelogram, the opposite sides are equal, not supplementary. Therefore, it cannot be a cyclic quadrilateral.

## How do you find the diagonal of a cyclic quadrilateral?

Diagonals in a Cyclic Quadrilateral AC / BD = (AB·AD + BC·CD) / (AB·BC + AD·CD).

## How do you find the area of a cyclic quadrilateral?

Example: In a circular grassy plot, a quadrilateral shape with its corners touching the boundary of the plot is to be paved with bricks. Find the area of the quadrilateral when the sides of the quadrilateral are 36 m, 77 m, 75 m and 40 m. The area of the cyclic quadrilateral =√78×37×39×74=39×37×2=2886 square meters.