Q: What shape that has one more side than a triangle?

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A triangle for example has 3 vertices.

One more side.

There is no such right triangle. You have defined the relationship between three sides of a triangle that does not have a 90 degree angle. In a right triangle the sum of the squares of the shorter sides equals the square of the longest side and 12 + 22 = 5 ; 42 = 16 it does not equal 5 The angles in a triangle with sides 1, 2, 4 units can be found by applying the cosine rule.

Triangle means 3 angles. No other shape exists and any three angle shape is a triangle

You are a triangle.

Related questions

a quadrilateral such as a square, rhombus, or rectangle

triangle * * * * * A triangle is NOT a 3d shape! A cube.

A triangle has three sides, so a hexagon (a shape with six sides) would have three more sides than a triangle.

An octagon.

hexagon

a square

A polygon with 2 more side than a triangle is a 5 sided pentagon.

A triangle for example has 3 vertices.

One more side.

If (and only if) the length of each pair of sides is greater than the third side, then it is possible to make a triangle.

triangle

Any geometric shape that has more than three sides.