# In visible surface detection methods what are the parameters ABCD?

i will tell when i have leraned. i will tell when i have leraned.

### What is the surface area of the visible sides of a rectangular pyramid?

The number of visible sides if one if viewed from the front or side. The elevation from an angular position would give two face whereas all four triangular faces will be visible from above. So the answer will depend on the viewing position. In every case, the dimensions of the triangles would be required to find the visible surface area.