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A.Collinear

B.Non collinear

C.Equal

D.None of these

Answer

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The points lying on the same line are called collinear points

Whereas,

The points that do not lie on the same line are called non-collinear points.

Points A, B and C are non-collinear points

\[ \to \]The sum of the angles of a triangle is always \[180\]degree

\[ \to \]The exterior angles of triangle always add up to \[{360^0}\]degrees

\[ \to \]The shortest side is always opposite the smallest interior angle. Similarly, the longest side is always opposite the largest interior angle.

Area of triangle: -

Area of triangle \[ = \] Half of product of base and height

\[Area = \dfrac{1}{2} \times Base \times Height\]

If ABC is a triangle, then it is denoted as \[\vartriangle ABC\] where A, B, and C are the vertices of the triangle. A triangle is a two-dimensional shape in Euclidean geometry, which is seen as three non-collinear points in a unique plane.

Hence a triangle is formed by joining three non-collinear points.