<p>I'm not sure where i read it but if i'm off tell me was there something about the exterior angles of a triangle have to equal to 180 or am i totally off? Someone fill in the blanks for me!</p>
<p>sum of interior angles 180
exterior 360</p>
<p>knowing this wont help you if you dont understand how to get it. </p>
<p>the sum of the interior and the exterior angles at 1 point in a triangle is 180.</p>
<p>so the sum of all interior and exterior angles is 180 * 3 = 540. 180+360=540</p>
<p>just extend the line segments of the triangle and it should be pretty straightforward.</p>
<p>ty crazy, hehe that’s somethign obvious i forgot but yeah it’s helpful to know it jsut for faster arithmetic.</p>