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 a circle of centre O, PR = 3a + 5 and RQ = 5a – 5, OR = 15 units, ∠ORP = 90°. Find the radius of the circle.