Answer: Area of triangle=30 cm²
Explanation:
Let's name the triangle ABC.
Assuming these are the 3 sides of the triangle, and naming them a,b,c.
a=5 cm
b=13 cm
c=12 cm
Semi perimeter of the triangle ABC= s = (a+b+c)/2
s=(5+13+12)/2 =30/2=15.
Area of triangle ABC= √(s * (s-a)*(s-b)*(s-c)
= √(15*(15-5)*(15-13)*(15-12)
= √15*10*2*3
= √150*6
=√900
=30 cm²
Area of triangle ABC = 30 cm².