MYTUTOR SUBJECT ANSWERS

1063 views

The area of a square is 49cm^2. The perimeter of the square is equal to the circumference of a circle. what is the radius of the circle?

This is a geometry question. 

We know that a square has 4 equal sides of x, and that it's area is given by A=x2

So we can work out the length of the side of the square. 

x=sqrt(49) = 7

We are told this is equal to the circumference of the circle.

The equation for circumference of a circle is, c=2πr 

We need to find r, so we can rearrange this to give; r = c / 2π

Substituting in the value for c =49 cm

we get r = 49 / 2π  = 7.80 cm

*Don't forget units! 

Julia C. GCSE Chemistry tutor, A Level Chemistry tutor, 13 plus  Math...

1 year ago

Answered by Julia, who tutored GCSE Maths with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

533 SUBJECT SPECIALISTS

PremiumShruti V. 13 Plus  Maths tutor, 11 Plus Maths tutor, A Level Maths tu...
£30 /hr

Shruti V.

Degree: Biomedical Engineering (Masters) - Southampton University

Subjects offered:Maths, Physics+ 2 more

Maths
Physics
Chemistry
-Personal Statements-

“I am patient and friendly and strive for a comfortable and fun working environment that also achieves results.”

£18 /hr

Isobel B.

Degree: Theoretical Physics (Masters) - University College London University

Subjects offered:Maths, Science+ 5 more

Maths
Science
Physics
Further Mathematics
Economics
Art
-Personal Statements-

“I am 20 years old and currently studying Theoretical Physics at UCL. I have a lot of experience tutoring and have a passion to help others learn.”

£22 /hr

Lucy B.

Degree: Anthropology (Doctorate) - Cambridge University

Subjects offered:Maths, Science+ 5 more

Maths
Science
Drama
Chemistry
Biology
-Personal Statements-
-Oxbridge Preparation-

“Enthusiastic Cambridge grad, with experience in Biology and Maths, passionate about helping students reach their potential and achieve the grades they deserve. ”

MyTutor guarantee

About the author

Julia C.

Currently unavailable: for new students

Degree: Chemical Engineering (Masters) - Birmingham University

Subjects offered:Maths, Physics+ 2 more

Maths
Physics
Chemistry
-Personal Statements-

“About Me: I am a 3rd year Chemical Engineering student with a strong background in the STEM subjects.  I am a tutor with almost 4 years' experience of working with a range of different students. Every student learns differently and e...”

You may also like...

Posts by Julia

Describe the 3 types of isomers?

The area of a square is 49cm^2. The perimeter of the square is equal to the circumference of a circle. what is the radius of the circle?

Other GCSE Maths questions

You are given a square which you are told has a total area of 100 squared centimetres. You are also told that one side of the square has dimension 4(3x + 2), and the other has dimension 8x - y. What are the values of x and y?

Solve X^2 +13X+48=12

If I have £730 in my bank account which has 2.5% compound interest per year, how much more money will be in there after two years?

Factorise fully 3*a^3*b +12*a^2*b^2 + 9*a^5*b^3

View GCSE Maths tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok