Hello Student, Here in this post We will discuss about Triangle. Students & Children who wants to know a detailed knowledge about Triangle, then Here we posted a detailed view about Triangle.

**Triangle**

(1) Triangle is polygon with three sides and three angles.

(2) Sum of all three interior angles of a triangle is 180°.

(3) The opposite side of the greater angle is always the longest side.

(4) Sum of any two sides of a triangle is always greater than the third side.

(5) Perimeter of a triangle can be calculated by adding all three sides.

(6) Area of a triangle is equal to half the triangle height and its base.

(7) When all three interior angles are below 90 then the triangle is called acute triangle.

(8) When any of the interior angle of a triangle is equal to 90° then the triangle is called as right angle.

(9) When any of the interior angles of a triangle is greater than 90° then the triangle is called obtuse angle.

(10) When a straight line is drawn to connect an angle with the mid-point of the opposite side, then it is called median.

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