title: create drawable shape of right angled triangle
body: <p>I am trying to find out how to use drawable xml (<code>&lt;shape&gt;</code>) to create a right angled triangle like below (but fill with color without the black line):</p>
  
  <p><a href="https://i.stack.imgur.com/LNIEy.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/LNIEy.png" alt="enter image description here"></a></p>
  
  <p>I try to think from the angle of halving a rectangle from diagonal line, but still...can't find how to achieve it.</p>
  
  <p>Is it doable with Android drawable xml?</p>