The perimeter of an equilateral triangle ABC is 10.2 cm. What is the area of the triangle ?
A1.89 \sqrt{3}$ $cm^2
B2.89 \sqrt{3}$ $cm^2
C28.9 \sqrt{3}$ $cm^2
D18.9 \sqrt{3}$ $cm^2
A1.89 \sqrt{3}$ $cm^2
B2.89 \sqrt{3}$ $cm^2
C28.9 \sqrt{3}$ $cm^2
D18.9 \sqrt{3}$ $cm^2
Related Questions:
In the trapezium ABCD, AB=3 centimetres, BD=5 centimetres, BC=6 centimetres. The area of the trapezium is: