If the altitude of an equilateral triangle is 9 cm then find out its area?
Altitude of equilateral triangle = 9 cm √3/2 × side = altitude side = (9×2)/√3 = 6√3 cm Area of equilateral triangle = √3/4 × side² = √3/4 × 6√3 × 6√3 = 27√3 cm²
124, 180, 108, 198, ?, 220
25 54 ? 228 460 924
...72, 97, 147, ?, 322, 447
1, 6, 27, 124, ?, 3906, 27391
...Complete the series choosing the missing number.
110, 99, 86, ___, 54, 35.
10,14,26,42,70,?
18, 37, 60, ?, 120, 157
126 56 ? 12 10 2
...96 89 ? 90 94 91
...3 8 26 93 ? 1985 11940
...
