Question

find radius if circumference 54 cm​

Answer 1

Answer:

Use the formula of circumference to find the radius.

Step-by-step explanation:

2*pie*radius= 54!

Answer 2

Given ÷

Circumference = 54cm

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Concept clearance...

Find radius = ???

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Solution..

$circumference = 2\pi \: r \\ \\ 54cm = 2 \times \frac{22}{7} \times r \\ \\ \frac{54cm \times 7}{2 \times 22} = r \\ \\ \frac{378}{44} = r \\ \\ \color{yellowgreen} \boxed{r = > 8.59 \: \: \: or \: \: \: \: 9cm}$

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Some other formulas in maths .....✨✨

(1) Area of circle => πr²

(2) Area of rectangle => length x breadth

(3)Area of square > Side x side

(4) Perimeter of square => 4x side

(5) Permiter of rectangle => 2(lxb)

(6)Area of traingle=> 1/2 x base x height

(7) circumference of circle=> 2πr

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Hope it's helps you ☺️