Question 2

Rearrange the following formulae to make the letter shown in the square brackets the subject.

(a) \( A = \frac {1}{2}bh \) \( [b]\) (b) \( P = 2(L + B)\) \( [L]\) (c) \( V = \frac{1}{3}\pi r^2h\) \( [h]\)
(d) \( s = \frac{d}{t}\) \( [t]\) (e) \( s = ut + \frac{1}{2}at^2\) \( [u]\) (f) \( A = 2\pi r(r + h)\) \( [h]\)
(g) \( k = \frac{3d}{2a + c}\) \( [a]\) (h) \( A = d(\frac{a+b}{2})\) \( [d]\) (i) \( A = d(\frac{a+b}{2})\) \( [a]\)
(j) \( y = \frac{a - b}{x}\) \( [x]\) (k) \( S = \frac{1}{2}n(a + d)\) \( [a]\) (l) \( a^2 = b^2 + c^2 - 2bccosA\) \( [cosA]\)