MATH SOLVE

4 months ago

Q:
# The perimeter of the base of the regular quadrilateral pyramid is P = 30 cm. Find the sum of all edges of this pyramid, if the perimeter of a lateral face is 27.5 cm

Accepted Solution

A:

The perimeters of two opposite triangular faces includes all 4 slant edges and 2 of 4 base edges. The other two base edges are half the base perimeter, so the total length of all edges is

.. 2*(27.5 cm) +(1/2)*(30 cm) = 70 cm

.. 2*(27.5 cm) +(1/2)*(30 cm) = 70 cm