Question

What is the area of the triangle having sides of length 7cm, 8cm and and 9cm?

Answer 1

Answer:

26.832 sq. cm

Step-by-step explanation:

Area of the triangle = root over √ s(s−a)(s−b)(s−c)

s=a+b+c/2

  s=7+8+9/2=24/2= 12 cm.

Area of the triangle =root over√ 12(12−7)(12−8)(12−9)

=root over√12×5×4×3=root over√36×4×5 = 6×2√ 5

=6×2.236=12×2.236=26.832sq.cm.