each side of an equilateral triangle is equal to the radius of a circle whose area 154cm^2 . The area of the triangle is
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Answer:
Area of equilateral triangle = 21.22 cm²
Step-by-step explanation:
Area of circle = 154 cm²
Formula : Area of circle = πr² sq. units
→ πr² = 154
→ 22/7 × r² = 154
→ r² = (154 × 7)/22
→ r² = 49
→ r = √49 = 7
Now,
Area of equilateral triangle = (√3 side²)/4 sq. units
= (√3 × 7 × 7)/4 cm²
= 21.22 cm²
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