Surface area and Volume

the surface area and volume of a prism and pyramids are different but also the same... the prism sa=2(l*w)+2(l*h)+2(w*h) and the volume is height times area of the base. pyramids is sa=Lateral area*base area. and the volume is 1/3*Bh.   cylinders and cones have the same resemblance of the ones above. cylinder sa is 2*3.14*r^2+2*3.14*r*h and the volume is 3.14*r^2*h. the cones are sa is L+B and volume is 1/3*3.14*r^2*h.

ch. 10

 I have learned to find angles, and line widths of a circle. I have also learned to find lines in the circle and out of the circle measures.
careers that use this are architects, designers and scientist, because to fit the object were needed or figure out how large or small the circle is without jamming things difficult.
how come opposite angles are not congruent?