The point of concurrence of medians of a triangle is called centroid.

The point of concurrence of altitudes of a triangle is called orthocentre.

Centroid of a triangle divides its median in the ratio of $1:2$ from the vertex.

The number of independent measurements required to construct an isosceles trapezium is three.

Angle made by the longest chord of a circle at its centre is $180°$.

How many ex-circles can be drawn for a triangle?

In $△ABC$, if $A=60°, B=50° \mathrm{and} C=70°$, then the longest side of the triangle $ABC$.

In a rhombus, if diagonals are equal, then the rhombus necessarily will be _____.

What do you call the triangle whose two of its angles are $40° \mathrm{and} 70°$?