Question

Draw a pair of tangents to a circle of radius 4 cm from a point which is 9 cm

away from the centre of the circle. Measure the length of the tangents

Answer 1

Answer:

(radius)^2 +(length of tangent)^2=( length of common line)^2

4^2+ t^2=9^2

t^2=81-16

t^2=65

t=65^1/2

Step-by-step explanation:

draw a circle of radui 4 cm

then put the one end of scale at centre of circle and draw a line segment of 9cm

from that extreme point cut the arc on the circle

then join the arc with the extreme point

now calculate the length of tangent u have drawn

it will equal to square root of 65