Find the boundary points of the ribs, the length of which are looking for. Let it be points A and B.
Set the coordinates of the points A and B. They need to ask three-dimensional, because the pyramid three – dimensional figure. Get A(x1, Y1, z1) and B(x2, y2, z2).
Calculate the needed length, using the General formula: edge length of a pyramid is equal to square root of the sum of squares of differences of corresponding coordinates of boundary points. Substitute the numbers for your coordinates into the formula and find the length of the edges of the pyramid. In the same way, find the length of the ribs is not only the right of the pyramid, but rectangular, and truncated and arbitrary.
Find the length of the edges of the pyramid, in which all edges are equal, set the base figure and known height. Determine the location of the base height, i.e. the lower point. Since edges are equal, then it is possible to draw a circle whose center is the intersection point of the diagonals of the base.
Draw straight lines connecting the opposite corners of the base of the pyramid. Mark the point where they intersect. This point will be the lower bound of the height of the pyramid.
Find the length of diagonal of a rectangle using the Pythagorean theorem, where the sum of the squares of the legs of a right triangle is equal to the square of the hypotenuse. Get A2+b2=c2, where a and b are the legs and C is the hypotenuse. The hypotenuse will then be equal to the square root of the sum of the squares of the legs.
Find the length of the edges of the pyramid. First divide the length of the diagonal in half. All the data, substitute values in the formula of Pythagoras, are described above. Similar to the previous example, find the square root of the sum of the squares of the height of the pyramid and the half-diagonal.