Two-dimensional.
Chat with our AI personalities
NO!!! A triangle is a 2-dimensional shape of three sides; archaically a 'trigon'. A polyhedron is a 3-dimensional solid of many sides.
A three-sided, two-dimensional polygon is called a "triangle".
An isosceles triangle.
Two-dimensional shapes are shapes that are flat on the page, such as a square, circle, rectangle, triangle, etc. In contrast, some examples of three-dimensional shapes are cube, sphere, prism, pyramid, etc.
uhh, a triangle?