A triangle-based pyramid has one right angle at the apex where the three triangular faces meet. This right angle is formed by the intersection of the base of the pyramid and one of its slant edges. The other angles in a triangle-based pyramid are typically acute angles formed by the base and the slant edges.
No angles are larger than 90 degrees in a square based pyramid.
Yes - it has four around the base !
A triangle can never have three right angles
In a right angled triangle the two other angles are acute.
In a right angled triangle the two other angles are acute.
No but a right angle triangle does
No angles are larger than 90 degrees in a square based pyramid.
Not normally if it's a regular based pentagonal pyramid.
Yes - it has four around the base !
4
A triangle is a 2D shape, so as such it has no volume. (Since it is a length and a width, but has no depth). The equivalent of a triangle in 3D is a triangular based pyramid, which clearly does have a volume. You may have meant "area" rather than volume?
Normally four but there could be six if the opposite edges at the apex met at right angles.
A triangle has no right angles when it is not a right angle triangle as for example as in the case of an equilateral triangle that has 3 equal 60 degree angles.
Yes its base contains 4 corner right angles
There are no obtuse angles in a right triangle. A right triangle consists of one right angle and two acute angles.
There are no right angles (90 degrees) in a hexagonal pyramid.
A triangle can never have three right angles