Question

Find the area of a triangle​

Answer 1

B.17.5cm²

Explanation:

S=a+b+c/2=

5+8+7/2=10

S=10

Area of the triangle=
`√(3(5-a)(5-b)(5-c))`

⇒
`√(10(10-5)(10-8)(10-7))`

⇒
`√(10*5*2*3)`

⇒
`√(300)`

⇒17.5cm²

hope it helps...

have a great day!!