Question

Consruct an equilateral $△$ABC of side 5 cm. Draw a circle circumscribing the $△$ABC. The length of the circumradius is .

• A. 2.2 cm
• B. 1.6 cm
• C. 2.7 cm

Answer 1

The correct option is A 2.2 cm

Construct a $△$ABC of 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