- What is the region bounded by two radii?
- What do you the area bounded by two radii which are at right angles to each other and the arc which lies between them it is a quarter of a circle?
- What is the area of a circle enclosed between two radii and an arc is called?
- What is the region bounded by an arc of a circle and two radii to the endpoints of the arc?
- What is the measure of the arc of the sector?
- What is the ratio of the measure of the arc to the circle?
- What do you call the distance passing the center of the circle at two points?
- What is the relation between arc and radius?
- What is the ratio of a circle?
- What is double the radius?
- What is the radius of curvature of the mirror?
- What is the focal length if radius of curvature is 20 cm?
- What is the focal length of mirror if radius of curvature is 30 cm?
- What is the focal length of a lens goes radius of curvature is 30 cm?
- What is the focal length of a convex mirror whose radius of curvature is 32 cm?
- Why do we prefer a convex mirror whose radius of curvature is 32 cm?
- What is the focal length of a convex mirror whose radius of curvature is 64 cm?
- What is the focal length of a mirror whose radius of curvature is 13 cm *?

## What is the region bounded by two radii?

sector

## What do you the area bounded by two radii which are at right angles to each other and the arc which lies between them it is a quarter of a circle?

The area of a sector is bounded by two radii and an arc. A segment is an area that is bounded by a chord and by the circumference of the circle between the points of the chord. Where a segment is exactly half a circle, it is called a semicircle.

## What is the area of a circle enclosed between two radii and an arc is called?

A circular sector or circle sector (symbol: ⌔), is the portion of a disk enclosed by two radii and an arc, where the smaller area is known as the minor sector and the larger being the major sector. The portion of a circle between two radii and an arc is called a sector.

## What is the region bounded by an arc of a circle and two radii to the endpoints of the arc?

A sector of a circle is a region bounded by an arc and the two radii to the endpoints of the arc. A segment is a part of a circle bounded by an arc and the segment joining the arc’s endpoints.

## What is the measure of the arc of the sector?

A central angle which is subtended by a major arc has a measure larger than 180°. The arc length formula is used to find the length of an arc of a circle; ℓ=rθ ℓ = r θ , where θ is in radian. Sector area is found A=12θr2 A = 1 2 θ r 2 , where θ is in radian.

## What is the ratio of the measure of the arc to the circle?

Clearly, that ratio is independent of r. In general, the radian measure of an angle is the ratio of the arc length cut off by the corresponding central angle in a circle to the radius of the circle, independent of the radius. θ = arc lengthradius .

## What do you call the distance passing the center of the circle at two points?

The distance from a circle’s center to a point on the circle is called the radius of the circle. A diameter is a chord that passes through the center of the circle. A secant is a line that intersects with a circle at 2 different points. In the circle below, line E is a secant.

## What is the relation between arc and radius?

An arc is the portion of the circumference of a circle between two radii. Likewise, two arcs must have congruent central angles to be similar….Which properties of circle B are the same as in circle A?

Property | Same or different |
---|---|

Radius length | Same/Different |

## What is the ratio of a circle?

Circles are all similar, and “the circumference divided by the diameter” produces the same value regardless of their radius. This value is the ratio of the circumference of a circle to its diameter and is called π (Pi).

## What is double the radius?

The circumference of a circle is equal to the diameter times pi. So, let’s look at what happens if you double the radius of a circle — say from 2 to 4. The area will go from 12.56 to 50.24. This means that it has quadrupled. So when you double the radius, the area goes up by 4 times because 2 squared is 4.

## What is the radius of curvature of the mirror?

A spherical lens or mirror surface has a center of curvature located either along or decentered from the system local optical axis. The vertex of the lens surface is located on the local optical axis. The distance from the vertex to the center of curvature is the radius of curvature of the surface.

## What is the focal length if radius of curvature is 20 cm?

The radius of curvature of a spherical mirror is 20 cm. What is its focal length? Therefore, the focal length of the spherical mirror is 10 cm.

## What is the focal length of mirror if radius of curvature is 30 cm?

1 Answer. Focal length is half the radius of the mirror.

## What is the focal length of a lens goes radius of curvature is 30 cm?

Answer. Hence, the focal length of the given convex mirror is 16 cm.

## What is the focal length of a convex mirror whose radius of curvature is 32 cm?

Find the focal length of a convex mirror whose radius of curvature is 32 cm. The focal length of a spherical mirror is equal to half the radius of curvature of that mirror. Hence, the focal length of the given convex mirror is 16 cm.

## Why do we prefer a convex mirror whose radius of curvature is 32 cm?

Convex mirror can cover a wider range and give erect and diminished image. Hence convex mirror is used as a rear-view mirror to get wider field of view. Q5. Find the focal length of a convex mirror whose radius of curvature is 32 cm.

## What is the focal length of a convex mirror whose radius of curvature is 64 cm?

So focal length of the convex mirror will be 16 cm.

## What is the focal length of a mirror whose radius of curvature is 13 cm *?

So, according to your question the radius of curvature of a convex mirror is 32cm. 16 cm. So the focal length of the convex mirror is 16cm.