Question : The orthocentre of an obtuse-angled triangle lies:

Question : A point $p$ lying inside a triangle is equidistant from the vertices of the triangle. Then the triangle has P as its:

Question : The point equidistant from the vertices of a triangle is called its:

Question : The point where all three medians of a triangle meet is called:

Question : In an isosceles triangle, if the vertex angle is twice the sum of the base angle, then the measure of the half of the vertex angle of the triangle is: