JavaScript: Draw a right-angled triangle

JavaScript Drawing: Exercise-4 with Solution

Write a JavaScript program to draw the following right-angled triangle.

Sample output:

right angled triangle

Sample Solution:

HTML Code:

<!DOCTYPE html>
<meta charset=utf-8 />
<title>Draw a right-angled triangle</title>
<body onload="draw();">
<canvas id="canvas" width="150" height="150"></canvas>

JavaScript Code:

function draw() 
  var canvas = document.getElementById('canvas');
  if (canvas.getContext)
    var context = canvas.getContext('2d');


Live Demo:

See the Pen javascript-drawing-exercise-4 by w3resource (@w3resource) on CodePen.

Improve this sample solution and post your code through Disqus.

Previous: Write a JavaScript program to draw two intersecting rectangles, one of which has alpha transparency.
Next: Write a JavaScript program to draw the following diagram [use moveto() function].

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.

Follow us on Facebook and Twitter for latest update.