Answered

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In ADEF, d = 1.7 cm, e = 8 cm and f=9.3 cm. Find the area of ADEF
to the nearest 10th of a square centimeter.

Sagot :

Answer:

 

 3.6 cm²

Heron's formula is usually used for calculating triangle area from side lengths.

The semiperimeter is ...

 s = (7.2 +1.2 +6.6)/2 = 7.5

Then the area is ...

 A = √(s(s -f)(s -g)(s -h)) = √(7.5(0.3)(6.3)(0.9)) = √12.7575

 A ≈ 3.57176 cm²

The area of ΔFGH is about 3.6 square centimeters.

Step-by-step explanation:

Hope this helps:)

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