Yes, some triangles will have what in math they call a "Hidden angle." These will contain 3 regular angles adding up to 180 degrees and an additional angle with a maximum degree of 87. To calculate the hidden angle the most ethical approach is to use the Tangent Law.
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A pentagon has 3 triangles and 5 sides
isosceles triangles have 2 congruent sides scalene triangles have no congruent sides equilateral triangles have 3 congruent sides
Triangles with three equal sides are called equilateral triangles.
no. if one triangles sides are all 2 and one triangles sides are all 3 then they are not congruent
Triangles have 3 sides.