# CONSTRUCTION OF ANGLE BISECTOR

## About "Construction of angle bisector"

Construction of angle bisector :

Even though students know what is angle bisector, many students do not know, how to construct angle bisector.

Here we are going to see "How to construct angle bisector step by step"

## Construction of angle bisector

To construct an angle bisector, you must need the following instruments.

1. Ruler

2. Compass

3. Protractor

The steps for the construction of an angle bisector are.

Step 1 :

Construct an angle of given measure at O using protractor.

Step 2 :

With ‘O ’ as center draw an arc of any radius to cut the rays of the angle at A and B.

Step 3 :

With ‘A’ as center draw an arc of radius more than half of AB, in the interior of the given angle.

Step 4 :

With ‘B’ as center draw an arc of same radius to cut the previous arc at ‘C’.

Step 5 :

Join OC.

OC is the angle bisector of the given angle.

This construction clearly shows how to draw the angle bisector of a given angle with compass and straightedge or ruler. The angle bisector divides the given angle into two equal parts.

For example, if we draw angle bisector for the angle 60°, the angle bisector will divide 60° in to two equal parts and each part will measure 30°.

Key Concept - Angle bisector

The angle bisector of a given angle is the line of symmetry which divides the angle into two equal parts.

## Construction of angle bisector - Practice question

Construct <AOB = 80° and draw its angle bisector.

Step 1 :

Construct <AOB = 80° angle at the point ‘O’ using protractor

Step 2 :

With ‘O’ as center draw an arc of any radius to cut the rays OA and OB at the points X and Y respectively.

Step 3 :

With ‘X’ as center draw an arc of radius more than half of XY in the interior of the angle.

Step 4 :

With ‘Y’ as center draw an arc of the same radius to cut the previous arc at C. Join OC.

Using the steps explained above, in the above figure, angle bisector is drawn at O.

OC is the angle bisector of the given angle 80°.

Hence, OC divides the angle 80° in to two equal parts and each part measures 40°.

After having gone through the stuff given above, we hope that the students would have understood "How to construct angle bisector"

If you need any other stuff in math, please use our google custom search here.

WORD PROBLEMS

HCF and LCM  word problems

Word problems on simple equations

Word problems on linear equations

Algebra word problems

Word problems on trains

Area and perimeter word problems

Word problems on direct variation and inverse variation

Word problems on unit price

Word problems on unit rate

Word problems on comparing rates

Converting customary units word problems

Converting metric units word problems

Word problems on simple interest

Word problems on compound interest

Word problems on types of angles

Complementary and supplementary angles word problems

Double facts word problems

Trigonometry word problems

Percentage word problems

Profit and loss word problems

Markup and markdown word problems

Decimal word problems

Word problems on fractions

Word problems on mixed fractrions

One step equation word problems

Linear inequalities word problems

Ratio and proportion word problems

Time and work word problems

Word problems on sets and venn diagrams

Word problems on ages

Pythagorean theorem word problems

Percent of a number word problems

Word problems on constant speed

Word problems on average speed

Word problems on sum of the angles of a triangle is 180 degree

OTHER TOPICS

Profit and loss shortcuts

Percentage shortcuts

Times table shortcuts

Time, speed and distance shortcuts

Ratio and proportion shortcuts

Domain and range of rational functions

Domain and range of rational functions with holes

Graphing rational functions

Graphing rational functions with holes

Converting repeating decimals in to fractions

Decimal representation of rational numbers

Finding square root using long division

L.C.M method to solve time and work problems

Translating the word problems in to algebraic expressions

Remainder when 2 power 256 is divided by 17

Remainder when 17 power 23 is divided by 16

Sum of all three digit numbers divisible by 6

Sum of all three digit numbers divisible by 7

Sum of all three digit numbers divisible by 8

Sum of all three digit numbers formed using 1, 3, 4

Sum of all three four digit numbers formed with non zero digits

Sum of all three four digit numbers formed using 0, 1, 2, 3

Sum of all three four digit numbers formed using 1, 2, 5, 6