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Yes, a triangle is a "flat" figure. A triangle is three distinct points connected by line segments, and it takes three points to determine a plane. That translates to the fact that a triangle is a planar figure; it lies on a plane.
An easy way to see this is to take a string and tie the ends to any two points (like two table legs). Then pick up the string in the middle. The two ends and your fingers represent the three points of the triangle. No matter where you move your hand, the triangle will remain a flat figure.
Of course, if you draw a triangle on a sphere or other curved surface, the sides will be arcs, not straight lines.
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What is a plane figure for the triangle?
its self because a plane figure is a figure that is flat and has all strait sides.
What is two dimensional figure?
It is a figure that is flat. For example: triangle, square, pentagon...ect. A three dimensional figure is like a sculpture. Example: pyramid, cube prism...etc.
Is a triangle a solid figure?
No- a triangle is a plane figure, not a solid.
Define square based pyramid?
square based pyramid is made up of four triangle and a flat square base and it is a solid figure
Is an isosceles triangle a solid?
No. A triangle is a two-dimensional figure. It has only length and width, but not thickness. It's a flat shape that can be drawn on a piece of paper, whereas solids are 3-dimensional (for example, a pyramid).
