Problem 2023. Is this triangle right-angled?

Created by Tanya Morton

Solve Later

{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","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\"?><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 any three positive numbers a, b, c, return true if the triangle with sides a, b and c is right-angled. Otherwise, return false.</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

6916 Solutions
2845 Solvers

Last Solution submitted on May 10, 2021

Last 200 Solutions

Problem Comments

3 Comments

3 Comments

Shravankumar P on 18 Jun 2014

among a,b,c., specify the hypotenuse.

Flo Mo on 22 Sep 2016

that's the tricky part here ;) Check all combinations - too bad 'combvec' doesnt work here

Bunny Harlan on 25 Oct 2017

Passes for True, but Failing when I get to false test?? Not sure at the moment what I could be missing.

Solution Comments

Solution 5675300

1 Comment

1 Comment

john perkins on 4 May 2021 at 2:29

challenging!

Solution 4143610

1 Comment

1 Comment

Cory Cunningham on 11 Dec 2020

Yes, I finally got it

Solution 3832928

1 Comment

1 Comment

Adam Turner on 25 Nov 2020

The 2nd test is incorrect.

Solution 2673632

1 Comment

1 Comment

Umur Ulas Harman on 9 Jul 2020

function flag = isRightAngled(a,b,c)
x=[a b c];
y=sort(x);
flag = y(1)^2+y(2)^2==y(3)^2;
end

Solution 2590144

1 Comment

1 Comment

Piero Cimule on 20 Jun 2020

flag = false;
A = (acos((b^2+c^2-a^2)/(2*b*c)))*180/pi;
B = (acos((a^2+c^2-b^2)/(2*a*c)))*180/pi;
C=180-A-B;
D=[A,B,C];
if any(D==90)
flag = true;
end

Solution 579378

1 Comment

1 Comment

Yona on 4 Mar 2015

why is it correct? only because the test case.

a=100, b=20, c=5 will flag true but it not true

Solution 362995

1 Comment

1 Comment

Jon on 2 Dec 2013

Without using str2num or regexp

Problem Recent Solvers2845

Problem Tags

pythagoras

Community Treasure Hunt

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

Start Hunting!

Problem 2023. Is this triangle right-angled?

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers2845

Suggested Problems

More from this Author10

Problem Tags

Community Treasure Hunt

Problem 2023. Is this triangle right-angled?

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers2845

Suggested Problems

More from this Author10

Problem Tags

Community Treasure Hunt

Players