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We can use Heron’s formula to find the area of the triangle. First, find the semi-perimeter (s): s = (13 + 14 + 15) / 2 = 21 cm Now, use the formula for area: Area = √[s(s - a)(s - b)(s - c)] Area = √[21(21 - 13)(21 - 14)(21 - 15)] Area = √[21 × 8 × 7 × 6] Area = √[7056] Area = 84 cm² Correct Option: a) 84 cm²
Select the option that is related to the third number in the same way as the second number is related to the first number.
15 : 5 :: 26 : (?)
Select the number from the given option that can replace the question mark [?] in the following series.
515, 517, 520, 525, 532, 543, 556, ?
Find the missing number.
Select the number from among the given option that can replace the question mark (?) in the following series.
6, 31, 126, 381, 766, ?
Find the missing number.
20, 30, 42, 56, 72, ?
Select the number from among the given option that can replace the question mark (?) in the following series.
4, 21, 86, 261, 526, ?
A series is given with one term missing. Choose the correct alternatives from the given ones that will complete the series.
18, 19, 27, 36, ___, 225
In each of the following questions select the related letter/word/figure/number from the given alternatives.
JRH : ? : : KOV : 51
Select the combination of numbers that when placed sequentially in the blanks of the given series will complete the series.
3 _ 3 _ 5 3 3 5 _ 3 3...
In the following question, select the missing number from the given alternatives.
45, 15, 60, 75, 135, ?
