Which of the following is /are true?

Which of the following is /are true?

A. Attitude is required for calculating area by heron’s formula.
B. Attitude is not required for calculating area by heron’s formula.
C. Semi-perimeter is required for calculating area by heron’s formula.
D. Semi-perimeter is not required for calculating area by heron’s formula.

Answer

B and C

Explanation

By Heron’s formula,

Area = √s(s-a)(s-b)(s-c),

Where s = semi – perimeter and a, b, c are side lengths
Semi-perimeter = sum of side lengths/2

So, only the semi-perimeter and the side lengths are required.