Find the in radius of an equilateral triangle of side 10cm . User `r=A/s`.

What is the circum radius of an equilateral triangle of sides 8 centimetres?

A square is drawn on the altitude of an equilateral triangle of side 4 cm. a) What is the altitude of the triangle? b) What is the area and perimeter of the square?

What is the area of the circumcircle of an equilateral triangle of sides 6 centimetres.

A square is drawn on the altitude of an equilateral triangle of side 2 metres. What is the area of the square? .