Question

The diagram shows a framework for a target. The radius of the
outer circle is 30 cm and the radius of the inner circle is 15 cm.
Calculate the total length of wire needed for the whole
framework.​

Answer 1

Answer:

$\huge\purple{\mathbb{ANSWER}}$

According to question,

Radius of larger circle is 5cm

and length of tangent AC to smaller circle is 8cm.

We know that , tangent is perpendicular to radius through point of tangency,

And M, is the mid point of tangent from figure,

so AM=4cm

Therefore ,

△AMO is the right angle triangle, with OM as radius of smaller circle,

So, from pythagorous theorem,

OA

2

=OM

2

+AM

2

=> 5

2

=OM

2

+4

2

=> OM=3

Answer 2

Answer:

OM=3

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