Tectonic plates are the surface of each and every thing on earth. all land forms rest upon them. When the plates shift, so does everything above it. But one thing is that you can barely notice it, approx. 1 inch year
The base of the pennant is 12 feet shorter than the height......A = (1/2) * b * h
80 = (1/2) * (h - 12) * h
160 = h^2 - 12h
12/2 = 6
6^2 = 36
h^2 - 12h + 36 = 160 + 36
(h - 6)^2 = 196
h - 6 = 14
h = 20
b = 8
