Question
The area of the circumcircle of an equilateral triangle
is 3π cm². The perimeter of the triangle is:Solution
Let side of an equilateral triangle = a cm ∴  circumcircle radius = a/√3 cm ∴  area of circumcircle = π(a/ √3)2 => πa2/3 = 3π ⇒  a2 = 9 ⇒  ∴ a  = 3 cm ∴  Perimeter = 3 × a = 9 cm
More Mensuration Questions
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
(1800.23 ÷ 29.98) + (816.32 ÷ 23.9) + 1634.11 = ?
39.99% of 159.98 = ?2 – 319.99% of 12.5 – 49.98% of 129.99
3.98 × 29.67 ÷ 11.90 of √24.89 = ?% of 199.79
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
`(601/49)xx(399/81)` ÷ `(29/201)` = ?
A shopkeeper sold an article after giving a discount of 25% and made a profit of Rs.40. Find the difference between the marked price and selling price o...
(155.34 + 234.78) ÷ 12.65 = ? ÷ 4.99
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