Problem 2021. Is this triangle right-angled?

Created by Tanya Morton

Solve Later

Given three positive numbers a, b, c, where c is the largest number, return true if the triangle with sides a, b and c is right-angled. Otherwise, return false.

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4787 Solutions
2810 Solvers

Last Solution submitted on Jul 03, 2020

Last 200 Solutions

Problem Comments

5 Comments

5 Comments

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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 2590249

1 Comment

1 Comment

Piero Cimule on 20 Jun 2020 at 23:16

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 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

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Problem 2021. Is this triangle right-angled?

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Last 200 Solutions

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Problem 2021. Is this triangle right-angled?

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Last 200 Solutions

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Problem Recent Solvers2810

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