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Hello!

Considering that the kite has a string with a length of 80 meters and is at 45º from the ground. The height of this will be given by the trigonometric relations between the wire and the angle.

H = L*sin(45º)

H = 80*sin(45º)

H = 40√2 m

Considering that √2 = 1.41, we have:

H = 40*(1.41) m

H = 56.57 m

Therefore, the kite is 56.57 meters high.

Fun fact: As the kite is at a 45º angle from the ground, the string plays the role of the diagonal of a square of 56.57 meters on a side.

Answer is 57 meters

hope it helps :-