A five sided pyramid.
Triangular prism
Triangular. the base is square, with four other triangular faces.
A pentagon consists of 5 bases and 5 angles.
pyramid
pyramid
An octagon is a plane figure. It has eight sides, but no real base.
A regular pentagon-based pyramid.
a pentagonal pyramid it has five triangular sides that all meet at a point at the top. the base is a pentagon
pyramid
Pyramid
The base is a pentagon. It has five isosceles triangles rising from the sides to a point above it.
The figure is a pyramid and the base is a square.
There is a contradiction in your question. If the base has four equal sides then is it a square so not all the faces are Triangles. However if the base is a square and the rest of the faces are triangles then your object is a "Square-based Pyramid"
A triangular pyramid. It has triangles on its 3 sides and a triangle on the bottom for a base.
Pyramid. Work: 4 sides (that you usually see) are triangles, the base (bottom) is a square
The answer is a pyramid.
it's a pyramid with 5 sides.
a pentagon is a 2 dimensional figure. It does not have a base.