A closed plane geometric figure, which formed by the three line segments is called triangle.

The word, triangle is formed by a prefix “tri” and a word “angle“. The meaning of tri is three. According to these two meanings, triangle is three angles.

Geometrically, three line segments can only form three angles when their endpoints are connected each other as a closed geometric figure. Hence, the closed plane figure, formed by the three line segments which can only form three angles is known as triangle geometrically.

Learn concept of angle with its representation to use them in triangle.

Learn concept of angle with its representation to use them in triangle.

Learn concept of angle with its representation to use them in triangle.

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