Nothing.
A triangle has three corners and three sides. The prefix "tri-" means three so it cannot gave six corners nor six sides.
a tetrahedron is a shape with 4 triangular faces, 6 sides and 4 vertices [corners]
5 faces 9 edges 6 corners
A quadrilateral.
There are 6 vertices (corners) in a triangular prism.
A Hexagon has 6 sides and 6 corners!
A triangular prism
A triangular based pyramid.
6
A triangular based pyramid would have 4 corners; three for the triangular base and one for the peak. A pyramid has twice as many edges as sides in its base; thus a triangular pyramid has 2 × 3 = 6 edges. A triangular based pyramid is called a tetrahedron.
Hexagon has 6 sides and 6 corners.
i have 6 corners. i have 6 sides
A triangular prism has 9 edges and 6 corners. P.S. In math, corners are called vertices.