cut it down the middle
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A square and rectangle both have congruent triangles in them.
no they do not they have to be equal so that proves there is NO lines of symmetry * * * * * It depends on the triangle. Equilateral triangles have 3 lines of symmetry, Isosceles triangles have 1 and all other triangles have none.
If there is a picture with 3 triangles and 1 upside down the the answer to that is OBVIOUSLY 5. Lol. The 4 triangles and the triangle going around the outside of the other little triangles inside of the picture.
equilateral triangles and regular pentagons
The intersection of two lines is a point. If both lines are straight the figure of four separate triangles are formed. The type of triangles are dependent on the angle of the intersection.