Problem 2021. Is this triangle right-angled?

Created by Tanya Morton

Solve Later

{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","targetMode":"","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","targetMode":"","relationshipId":"rId2","target":"/matlab/output.xml"}],"parts":[{"partUri":"/matlab/document.xml","relationship":[],"contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Given three positive numbers a, b, c, where c is the largest number, return</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:b/></w:rPr><w:t>true</w:t></w:r><w:r><w:t> if the triangle with sides a, b and c is right-angled. Otherwise, return</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:b/></w:rPr><w:t>false</w:t></w:r><w:r><w:t>.</w:t></w:r></w:p></w:body></w:document>"},{"partUri":"/matlab/output.xml","contentType":"text/xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?><embeddedOutputs><metaData><evaluationState>manual</evaluationState><layoutState>code</layoutState><outputStatus>ready</outputStatus></metaData><outputArray type=\"array\"/><regionArray type=\"array\"/></embeddedOutputs>"}]}

Solve

Solution Stats

7071 Solutions
3754 Solvers

Last Solution submitted on Jan 16, 2022

Last 200 Solutions

Problem Comments

5 Comments

5 Comments

Show 2 older comments

Sreeram Mohan on 24 Nov 2014

This is a good problem to refresh basic geometry

Joseph on 28 Sep 2015

The checking should include a random Pythagorean triple (given random natural numbers a>b: a^2-b^2, 2ab, and a^2+b^2 form a Pythagorean triple). For the checking right now, a~=2 passes the tests.

Rachel Wedemeyer on 5 Apr 2018

Basic triangle math plus if statements. Great example

Othmane ELMOUATAMID on 9 Aug 2018

This reminds me the old good days ... basic geometry as Sreeram Mohan said :)

nguyen thai son son on 27 Sep 2019

Brain clearance

Solution Comments

Solution 6982229

1 Comment

1 Comment

Haoran Tian on 28 Nov 2021

easy and interesting

Solution 6871529

3 Comments

3 Comments

Josh Klueber on 11 Nov 2021

tricky

Isabella Stellitano on 13 Nov 2021

Good problem

Isabella Stellitano on 13 Nov 2021

Hard problem

Solution 5675605

1 Comment

1 Comment

john perkins on 4 May 2021

nice

Solution 2590249

1 Comment

1 Comment

Piero Cimule on 20 Jun 2020

if (a^2+b^2-c^2==0)
flag = true;
else
flag = false;
end

Solution 2278962

1 Comment

1 Comment

Ali Osman Üstünel on 13 May 2020

Easy problem.

Solution 1687298

1 Comment

1 Comment

Gregory Fenn on 6 Dec 2020

Can we please block and ban all these fake answers that cheat the webapp into returning success when they haven't actually solved the problem?

Solution 1585578

2 Comments

2 Comments

A C on 17 Jul 2018

What is wrong with this code?

Abdul Muneeb on 24 May 2019

use
if c==sqrt(a^2 + b^2)
flag=true
else
flag=false

Solution 1117157

1 Comment

1 Comment

Jess Stuart on 7 Feb 2017

Should add tolerance of 10*eps to make this function practical. Otherwise you can have a triangle with a 89.9999999 deg angle and it will say it is not a right triangle. Matlab is a numerical language.

Solution 1022807

1 Comment

1 Comment

David Verrelli on 3 Sep 2018

This user (mohamed elbesealy) appears to have gamed the system, with fraudulent "likes" of this unremarkable solution submitted by 'sock-puppet' accounts. —DIV

Solution 797032

1 Comment

1 Comment

Malinda Siriwardana on 22 Dec 2015

mmm c is always grater than a and b

Solution 401299

1 Comment

1 Comment

Sumudu Tennakoon on 11 Feb 2014

This problem was repeated

Problem Recent Solvers3754

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 2021. Is this triangle right-angled?

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers3754

Suggested Problems

More from this Author10

Problem Tags

Community Treasure Hunt

Problem 2021. Is this triangle right-angled?

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers3754

Suggested Problems

More from this Author10

Problem Tags

Community Treasure Hunt

Players