It's a sphere.
the world
No. It is round.
Some of the pyramids in Antarctica resemble a triangular pyramid.
roof
shop around!
Roof of a house
Pyramids
tent
A triangular dipyramid.A triangular dipyramid.A triangular dipyramid.A triangular dipyramid.
The Triangular Trade was a route to receive slaves. It got its name from the three routes that formed a triangle on the world map.
The most inhuman part of the triangular trade was the middle passage, in which slaves were carried from Africa to the New World.
"triangular" is an adjective, not a noun. So there is no object such as "the triangular". The triangular WHAT?