Consruct an equilateral triangle ABC of side 5 cm. Draw a circle circumscribing the △ABC. Find the length of the circumradius.
2.9 cm
Construct a △ABCof side 5 cm.
Draw the perpendicular bisectors of any two sides of the triangle.
Let the perpendicular bisectors meet at point O.
Taking O as the centre and radius equal to OA (or OB or OC) draw the circle.
Measure OA, circumradius = 2.2 cm