Question
Using protractor, draw a right angle. Bisect it to get an angle of measure 45°.
✓
Answer
We know that a right angle is of 90°.
Draw a ray OA.
With the help of a protractor, draw an $\angle\text{AOB}$ of 90°.
With centre at O and a convenient radius, draw an arc cutting sides OA and OB at P and Q, respectively.
With centre at P and radius more than half of PQ, draw an arc.
With the same radius and centre at Q, draw another arc intersecting the previous arc at R.
Join O and R and extend it to X.
$\angle\text{AOX}$ is the required angle of 45°.
$\angle\text{AOB}=90^{\circ}$
$\angle\text{AOX}=45^{\circ}$
Draw a ray OA.
With the help of a protractor, draw an $\angle\text{AOB}$ of 90°.
With centre at O and a convenient radius, draw an arc cutting sides OA and OB at P and Q, respectively.
With centre at P and radius more than half of PQ, draw an arc.
With the same radius and centre at Q, draw another arc intersecting the previous arc at R.
Join O and R and extend it to X.
$\angle\text{AOX}$ is the required angle of 45°.
$\angle\text{AOB}=90^{\circ}$
$\angle\text{AOX}=45^{\circ}$
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