What is the scientific evidence for the theory of tectonic plates

Tectonic plates theory suggests land masses move around; albeit very slowly.

one evidence is that similar fossil remains were found in the Antarctic, West Africa and South America. That means some time in the past, these land masses were together then drifted apart.

I'm pretty sure there's a geometry rule for   anyways, if the triangle is equilateral, and the circle is circumscribed, the circle is outside of the triangle.  to find the area, you need the radius.  the radius should be a straight line from the center of the triangle to any of it's points.  draw lines from the center of the circle to each of the triangle points.  draw three more lines from the center to the middle of the sides of the triangle.  you should now have six separate 30-60-90 triangles inside of your original triangle. use your 30-60-90 rules to solve for the radius, then the circumference. 

Are there any words that will you