3. a) Draw a line AB = 5cm and a point C on it. Draw a line CD
perpendicular to AB.​

1 thought on “<br />3. a) Draw a line AB = 5cm and a point C on it. Draw a line CD<br />perpendicular to AB.​”

1. steps for construction

   · draw AB=5cm

   · with A as centre cut an arc of 3cm on AB and mark it C

   · with A as centre and radius 2.5cm, draw an arc and mark it O

   · with O as centre and radius 2.5cm, draw a circle so that points A and C lie on the circle formed

   · join OB

   · draw perpendicular bisector of OB to obtain mid point of OB, M

   · with M as the centre and radius equal to OM, draw a circle to cut the previous circle at point P and Q

   . join PB and QB, PB and QB are required tangents to the given circle from exterior point B

   QB=PB=3cm

   The length of the tangents is 3cm

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