Question

The radius of the radie of two circles is 5:3 find
the ratio of them circumference​

Answer 1

Answer:

ratio of the circumference=ratio of the radius

=5:3

Answer 2

According to the Question;

Radius of 2 circles is 5:3

Let the radius of 2 circles be r₁ and r₂ respectively.

$\red{ \sf{ \dfrac{r _{1} }{ r_{2}} = \dfrac{5}{3} }}$

We know that:

Circumference of a circle = 2 π r

$\sf{\dfrac{Circumference _{1}}{Circumference _{2}} = \dfrac{2 \pi \: r _{1} }{2 \pi \: r _{2}} }$

Cancelling 2π on both numerator and denominator,

We get the ratio is r₁ : r₂

So the ratio of circumference is also 5:3

Know more:

• Area of circle = π r ²