Question

13. Find the area of the triangle in which
2
(i) a = 13 m, b = 14 m, c = 15 m;
50 cm
69 cm​

Answer 1

On applying Herons formula,

area = √(21)(21 - 13)(21 - 14)(21 - 15)

= √(21) 8 × 7× 6

= √(21) 336

= √ 7056

= 84 m²