MYTUTOR SUBJECT ANSWERS

88 views

Using Pythagoras Theorem find the length of the hypotenuse of a right triangle where a=7 cm and b=11 cm. Round to the nearest tenth

Pythagos Theorem states that 

a^2 + b^2 = c^2

So using the figures we are given the equation would look like this:

7^2 + 11^2 = c^2

We square the numbers we can and then get:

49 + 121 = c^2

We add the left hand side up and get:

170 = c^2

We then must isolate the variable and since c is suared the only way to do that would be prreform the opposite function and take the square root of both side. Since 170 is not a perfect square we will put it into our calculators and see what we get.

The square root of 170 is approximately 13.038404...

Since the problems asks that we round to the nearest tenth we look at both that number and the one right behind it:

13.03

Since 3 is smaller than 5 we round down giving the answer of approximately 13 cm

Mary B. GCSE History tutor, IB History tutor, A Level History tutor, ...

3 months ago

Answered by Mary, a GCSE Maths tutor with MyTutor

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

324 SUBJECT SPECIALISTS

£20 /hr

Rowan F.

Degree: Chemistry (Masters) - Bristol University

Subjects offered: Maths, Chemistry+ 1 more

Maths
Chemistry
Biology

“About Me  I am a first year Chemistry student at the University of Bristol and a long with my love for Chemistry I am also incredibly interested in Maths and Biology, enjoying studying both of them at A level. By tutoring that I hope ...”

£18 /hr

Ruth W.

Degree: Biochemistry (Masters) - Birmingham University

Subjects offered: Maths, Science+ 3 more

Maths
Science
Physics
Chemistry
Biology

“About Me: I am a biochemistry student at the University of Birmingham.  I have always had a real passion and love for all things science and maths and I hope that my tutorials will instil this love in you too. I’m very patient and fr...”

MyTutor guarantee

£18 /hr

Emma W.

Degree: Natural Sciences (Bachelors) - Durham University

Subjects offered: Maths, Physics+ 2 more

Maths
Physics
Chemistry
Biology

“Hi! I'm Emma and I'm a second year Natural Sciences student from Durham University, which means I've studied biology, physics and maths at university level. I have a very friendly tutoring style as I believe students are most able to ...”

MyTutor guarantee

About the author

£18 /hr

Mary B.

Degree: History (Masters) - Manchester University

Subjects offered: Maths, History+ 1 more

Maths
History
English

“Top tutor from the renowned Russell university group, ready to help you improve your grades.”

MyTutor guarantee

You may also like...

Posts by Mary

Using Pythagoras Theorem find the length of the hypotenuse of a right triangle where a=7 cm and b=11 cm. Round to the nearest tenth

Using Trigonometric Identities prove that [(tan^2x)(cosecx)]/sinx=sec^2x

What is the difference between primary and secondary sources and when should they be used?

Other GCSE Maths questions

Factorise 4xy-6xz

How can I solve a quadratic equation by factorisation?

explain and show how quadratic equations are solved

Solve this pair of simultaneous equations (1) 5x+2y=20 and (2) x+4y=13

View GCSE Maths tutors

Cookies:

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

mtw:mercury1:status:ok