equilateral, scalene, isosceles and right angle.
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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
Irregular triangle
equalateral, isosiles, and right triangle
They are pyramids
rectangle is the "special name" of a shape with 4 corners (square). triangles are split in 3 groups. right triangle, one corner is 90 degrees equilateral triangle, every corner is 60 degrees isosceles triangle, two sides have the same length