tent
A basic camping tent, a house roof, and the iconic Toblerone box.
Some of the pyramids in Antarctica resemble a triangular pyramid.
some real world examples of a sphere could be a basketball ,baseball, soccerball ,or even there earth itself
Globe
A complementary angle is two angles whose sum is 900 (degrees). So you would need a triangular shaped structure whose bottom angles are 450 each. Possibly an Egyptian pyramid?
roof
Roof of a house
It's a sphere.
A basic camping tent, a house roof, and the iconic Toblerone box.
If you asking where you'd find them in the real world - Binoculars and telescopes are two examples.
Some of the pyramids in Antarctica resemble a triangular pyramid.
some real world examples of a sphere could be a basketball ,baseball, soccerball ,or even there earth itself
any box of tampons
A cereal box or a t.v. [not flat screen] or a book.
A square box. A special case is a cube or playing die.
The Planet Earth is the biggest sphere in the world.
i delcare that columus believed the world was flat, but it is a perfect sphere! does this answer your question?