Engineering Board Exam Reviewer · Quadrilaterals · hard
A cyclic quadrilateral has sides 5, 6, 7, and 8. Using Brahmagupta's formula, find its area.
- 40.99
- 42.00
- 36.00
- 45.28
Answer
A. 40.99
Solution
s=5+6+7+8/2=13. Area =sqrt((13-5)(13-6)(13-7)(13-8))=sqrt(8(7)(6)(5))=sqrt(1680) 40.99.
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