Problem 2021. Is this triangle right-angled?

Created by Tanya Morton

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Solution Stats

8195 Solutions
4629 Solvers

Last Solution submitted on Feb 01, 2023

Last 200 Solutions

Problem Comments

6 Comments

6 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

Nikita Kukhtin on 24 Jun 2022

great problem!

Solution Comments

Solution 8578565

Solution 6982229

2 Comments

2 Comments

Haoran Tian on 28 Nov 2021

easy and interesting

Tinu Golchha on 14 Sep 2022

easy one

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 Solvers4629

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Problem 2021. Is this triangle right-angled?

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Problem 2021. Is this triangle right-angled?

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Last 200 Solutions

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Problem Recent Solvers4629

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