Mathematics

The sum of the three interior angles of a

triangle is _.

(a)  

The sum of the lengths of 2 sides of a triangle is _ than the third side

(a)  

In a triangle,the opposite sides of congruent angles are _.

(a)  

The three median lines of a triangle meet at a single point called _.

(a)  

In an acute triangle the intersection of the altitudes is _ the triangle.

(a)