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a 30 x с Using cosine rule, Ac? - AB? + BC? + 2(AB) (BC) cos 30° -) x? c²ta ta' - 210)(a) V(32+(29)?- 2182)(29)/3 - x= + 2 = x= √257.65 6850576 la 16.05169 2) x ñ 16.1 B Using Heron's formula, Jis) (s-al(5-6)(5-C), s= semi-perimeter axa = atbic 2 = 20+15+25 2 = 60 2 = 30 :. Area = (30)( 30-20)(30-15) (30-25) 25130)(10)(15)(5) :) A => AS 22500 =) A = 150 square units.

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