Question

Q2) Draw 2 concentric circles of radii 3 cm and 5cm.Construct a tangent to smaller circle from a point on the larger circle. Also measure its length.​

Answer 1

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1. Draw two concentric circles of radii 3 cm and 5 cm with 'O' as centre
2. Take a point P on the outer circle. Distance of the point P from O will be 5 cm.
3. Bisect the line segment OP and let it be at M.
4. With M as centre and PM as radius draw a circle. Let this circle intersect the circle with radius 3 cm at points T and T'
5. Join PT and PT' They are the required tangents to the inner circle.
6. The radius of the inner circle is 3cm and the distance of the point P from O is 5 cm.
7. According to Pythagoras theorem,the length of the tangent will be 4cm.

Answer 2

Answer:

4 cm

Draw two concentric circle. Now mark their radius *3 and *5 respectively.

Draw any Tangent (Take a case that it touched the top of smaller circle lying perpendicular to it's Radius) take ideal case cuz it's not mentioned.

Now connect their two end point, you will see a triangle is form of Base and Hypnotise (3 and 5 responsible)

so definitely by calculation the length of req. line is 4cm