Problem: A rhombus is formed by two radii and two chords of a circle whose radius is 151515 feet. The area of the rhombus in square feet is:
Answer Choices:
A. 128128128
B. 1283128 \sqrt{3}1283​
C. 256256256
D. 512512512
E. 5123512 \sqrt{3}5123​ Solution:
A=16.83=1283A=16.8 \sqrt{3}=128 \sqrt{3}A=16.83​=1283​.