Triangle

Triangle[{p1, p2, p3}] represents a filled triangle with corner points p1, p2, and p3.

Triangle[{{p11, p12, p13}, ...}] represents a collection of triangles.

Examples

Draw a triangle:

Graphics[Triangle[{{0, 0}, {1, 0}, {0.5, 1}}]]

Colored triangle:

Graphics[{Blue, EdgeForm[Black], Triangle[{{0, 0}, {2, 0}, {1, 1.5}}]}]

Please visit the official Wolfram Language Reference for more details.