How to Prove Thales’s Theorem

<p>Now draw a line &mdash; its length equal to the diameter of the circle &mdash; through its center:</p> <p><img alt="The length of line AB is equal to the diameter of the circle." src="https://miro.medium.com/v2/resize:fit:700/1*IKWfoDmaYVDhsqO0EfmsVg.png" style="height:442px; width:700px" /></p> <p>The length of AB is equal to the diameter of the circle</p> <p>Choose a point somewhere on the circle (but not on the line), and call it&nbsp;<em>C</em>.</p> <p><img alt="We now have a circle with point A, B and C. A and B form a straight line with O, the center of the circle." src="https://miro.medium.com/v2/resize:fit:700/1*WwzkfzAAgLVlhmoCdlrlgg.png" style="height:437px; width:700px" /></p> <p>And finally, draw lines&nbsp;<em>AC&nbsp;</em>and&nbsp;<em>BC</em>:</p> <p><a href="https://medium.com/street-science/how-to-prove-thaless-theorem-6478b01a4413"><strong>Click Here</strong></a></p>