## Is Trisection of angle possible?

However, although there is no way to trisect an angle in general with just a compass and a straightedge, some special angles can be trisected. It is possible to trisect an arbitrary angle by using tools other than straightedge and compass.

## Why is angle Trisection impossible?

Since the roots have to add up to zero, this means that: Since the trisection equation has no constructible roots, and since cos(20°) is a root of the trisection equation, it follows that cos(20°) is not a constructible number, so trisecting a 60° angle by compass and straightedge is impossible.

**What is the meaning of angle Trisection?**

Angle trisection is the division of an arbitrary angle into three equal angles. It was one of the three geometric problems of antiquity for which solutions using only compass and straightedge were sought.

**How do you Trisect an arc?**

To trisect, do:

- Quadrisect the angle AOB, that is, divide it into four equal parts.
- Draw a circular arc (shown in orange) centered at O and radius 3/4 of OA.
- Swing an arc (not shown) of radius L centered at A′ and mark P′ its intersection with the arc A′B′, as shown.

### What is the formula of Trisection?

Generally trisection means dividing the line segment in the ratio 1:2 or 2:1 internally. We know that trisection divides the line segment in the ratio 1:2 or 2:1 internally.

### What is Trisection point?

Trisection points means the points which exactly divides the line segment into three equal parts.

**What is Trisection of a line segment?**

Trisection means dividing a line segment in three equal parts or dividing a line segment in the ratio 1:2 and 2:1.

**What are trisection points?**

## How did Archimedes solve the problem of trisection?

Archimedes (c. 285–212/211 bc) made use of neusis (the sliding and maneuvering of a measured length, or marked straightedge) to solve one of the great problems of ancient geometry: constructing an angle that is one-third the size of a given angle. Archimedes’ method of angle trisection.Encyclopædia Britannica, Inc.

## How to construct an angle trisection with a straightedge?

The steps to this construction are as follows. Given an angle, ∠ ABC, do the following: 1. Use your straightedge and compass to construct a line parallel to line BC that passes through point A. 2. Use the compass to construct a circle with center A and radius AB.

**How did Archimedes solve the problem of angle?**

Archimedes (c. 285–212/211 bc) made use of neusis (the sliding and maneuvering of a measured length, or marked straightedge) to solve one of the great problems of ancient geometry: constructing an angle that is one-third the size of a given angle.

**What is the measure of an angle trisection?**

An angle trisection is a construction that takes an angle and creates an angle that has a measure of 1/3 of the original angle.