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Mathematics

Draw ∠POQ = 64°. Also draw its line of symmetry.

Constructions

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Answer

The line of symmetry of an angle is its angle bisector.

Steps:

  1. Draw a ray OP.

  2. Place the centre of the protractor at O and the zero line along OP. Mark a point at 64°.

  3. Remove the protractor and join O with the marked point and produce it to Q. Then ∠POQ = 64°.

  4. With O as centre and any (suitable) radius, draw an arc to meet ray OP at C and ray OQ at D.

  5. With C as centre and any suitable radius (>12CD)\left(\gt\dfrac{1}{2}\text{CD}\right), draw an arc. Also, with D as centre and same radius, draw another arc to meet the previous arc at E.

  6. Join OE and produce it to form a ray.

Draw ∠POQ = 64°. Also draw its line of symmetry. Practical Geometry (Constructions), ML Aggarwal Understanding Mathematics Solutions ICSE Class 6.

Hence, ray OE is the line of symmetry of ∠POQ, and ∠POE = ∠EOQ = 32°.

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