Question

find the area of the triangle whose sides are 2.5 cm, 6 cm and 6.5 cm

Answer 1

Step-by-step explanation:

a side= 2.5

b base=6

c side=6.5

Using the formulas

A=s(s﹣a)(s﹣b)(s﹣c)

$\sqrt{?s(s﹣a)(s﹣b)(s﹣c)}$

s=a+b+c

2

Solving forA

A=1

4﹣a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4=1

4·﹣2.54+2·(2.5·6)2+2·(2.5·6.5)2﹣64+2·(6·6.5)2﹣6.54=7.5cm²