Answer:
x=6
Explanation:
to find an angle of a right angled triangle we use the pythagorean property
which is
hypotenuse^2 = base^2 + altitude^2
10^2=x^2+8^2
100= x^2 + 64
x^2 +64 = 100
x^2=100-64
x^2=36
x= √36
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