Question

Draw two circles of radii $4$ cm and $2.5$ cm touching internally. Measure and verify the distance between their centres

Answer 1

Draw a circle of radius $4cm$

We have given, $r_1=4cm,r_2=2.5cm$

$r_2-r_1=4-2.5=1.5cm$

Locate a point $O^{\prime }$ at a distance of $1.5cm$ in any direction from $O$

Draw a circle of radius $2.5cm$ taking $O^{\prime }$ as a centre.

Distance between centres $O{O}^{\prime }=1.5cm$