find the area of regular pentagon whose each side is 8 CM long and the radius of whose,circumscribed circle is 7cm
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11
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harshita4529:
where is the answer
Answered by
79
Answer:
Step-by-step explanation:
Area of the pentagon = {n/2 × a × √(R² - a²/4) square units
= {5/2 × 8 × √(7² - 64/4)} cm²
= {20 × √(49 - 16)} cm²
= (20 × √33) cm²
= (20 × 5.74) cm²
= (114.8) cm².
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