Q20 of 28 Page 12

Draw a circle of radius 6cm. From a point 10cm away from its centre, construct the pair of tangents to the circle and measure their lengths.

Step1: Draw circle of radius 6 cm with centre O



Step2: Draw segment OP of 10 cm



Step3: Using scale take midpoint of OP as M



Step4: take distance MP in compass and draw arcs intersecting the circle at points T and Q as shown



Step5: Draw lines passing through PT and PQ which are the required tangents and measure length PT and PQ them with scale



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Draw a circle of radius 5cm. Take a point P on the circle. Draw the tangent of the circle at point P without using the centre of the circle.

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Draw two concentric circles with centre O and radii 2 cm and 4 cm. From a point on the outer circle draw a tangent to the inner circle.

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Draw a circle of radius 4cm form a point on the concentric circle of radius 6cm and measure its length. Also, verify the measurement by actual calculation.