Question

a piece of wire is bent in the shape of an equilateral triangle of side 4.4cm if this wire is re bent to form a circle find the radius and area

Answer 1

length of wire = perimeter of triangle = 3×4.4 = 13.2 cm
now
circumference of circle = length of wire
2πr = 13.2
r = 13.2×7/2×22
r = 2.1 cm
Area of circle = πr² = 22/7×(2.1)² = 13.86 cm²