It is a 3 sided shape with 3 interior angles that add up to 180 degrees
No because the interior angles of a four sided shape can't exceed 360 degrees.
There is no such shape because shapes or polygons must have 3 or more sides and there are 3 interior angles in a 3 sided polygon which is a triangle that add up to 180 degrees.
The 3 interior angles of a triangle add up to 180 degrees
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2 or 3 dimensional?
It is a 3 sided shape with 3 interior angles that add up to 180 degrees
There are 3 lines of symmetry ina 6-sided shape.
that is a square with a triangle inside turned
The three internal angles add up to 180 degrees.
No because the interior angles of a four sided shape can't exceed 360 degrees.
There is no such shape because shapes or polygons must have 3 or more sides and there are 3 interior angles in a 3 sided polygon which is a triangle that add up to 180 degrees.
The 3 interior angles of a triangle add up to 180 degrees
to calculate this, you must find out how many triangles you can draw in to the shape. do this by picking an angle. draw a line to all of the other angles. (for a 12 sided, there would be 9, subtract 3 from any shape to see.) mutiply the number of triangles by 180 degrees. this should be the degrees of the shape. for a 12 sider, the answer would be 1620 degrees.
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A 3 sided shape is a triangle. A 4 sided shape could be a square or rectangle.
If you mean a "triangle" it is a 3 sided shape with interior angles adding to 180 degrees and exterior adding to 360 degrees.