They are pyramids
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my Answer that it is a triangle because a triangle has 3 sides and not 4 sides witch the triangle names are isosceles triangle and equilateral and scalene and right triangle and obtuse triangle ans acute triangle
A shape with three sides is called a triangle. A shape with ten sides is called a decagon.
what shape is not a triangle but has 3 sides
Their base shape. For example a rectangular prism has base that is a rectangle. Guess what kind of base shape a triangular prism has? yes, triangle.
A triangle is a geometric shape.