Draw a base line, for example, 7 inches long. Measure 3.5 inches and mark the middle. From this middle mark, draw a 7 inch vertical line at right-angles (90 degrees) to the base line. Draw a line from the top of the vertical line to one end of the base line. Repeat on the other side. You now have a triangular pyramid 7 inches tall by 7 inches a long the base. Alter the measurements to suit.
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A triangular pyramid has 4 triangular sides.A rectangular pyramid has 4 triangular sides and 1 rectangular side.
square pyramid
A triangular pyramid.
YesA triangular pyramid is a pyramid having a triangular base. The tetrahedron is a triangular pyramid having congruent equilateral triangles for each of its faces.
A triangular pyramid has a triangular base and three triangular faces meeting at its apex. A square pyramid has a square base and four triangular faces meeting at its apex.