Respuesta :

Jsf09

Answer:

7

Step-by-step explanation:

(a+b)/2 x h

42 = (8+4)/2 x h

42 = 6h

h = 7

zidaneboussofi2005

Answer:

height = 6.92820323028km (you can round if you want to)

Step-by-step explanation:

8km - 4km = 4km (this is for one of the side lengths of the traingle)

a² + b² = c²

4² + b² = 8² (b will be used to represent the height)

16 + b² = 64

b² = 48

b = 6.92820323028km

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