Rather like the shape of a well-known chocolate bar beginning with T? Use Pythagoras (the square on the hypotenuse is equal to the sum of the squares on the other two sides) to get the height of the triangle, multlply that by half the base(8) and then by 2 to get your answer.
3 sided shapes are triangles
A triangle with 3 different sided triangular measures is called a scalene triangle basically.
It is called a triangle.
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A three-sided, two-dimensional polygon is called a "triangle".
A triangle is a 3 sided polygon
A 3 side polygon is a TRIANGLE.
A 3-sided figure is called a triangle.
If it is 19 sided it cannot be a triangle. The "tri" in the word triangle means 3. So a triangle can have only 3 sides - no more, no fewer!
A triangle is classified as a 3 sided polygon.
A triangle is a 3 sided polygon
An equilateral triangle