The length of the unknown length is √39 ft if the other lengths are 5 ft and 8 ft in the right angle triangle.
What is a right-angle triangle?
It is defined as a triangle in which one angle is 90 degrees and the other two angles are acute angles. In a right-angled triangle, the name of the sides are hypotenuse, perpendicular, and base.
Let's suppose the unknown length is x ft
From the Pythagoras theorem:
[tex]\rm hypotenuse^2= perpendicular^2+ base^2[/tex]
[tex]8^2 = 5^2 +x^2[/tex]
64 = 25 + x²
x = √39 ft
Thus, the length of the unknown length is √39 ft if the other lengths are 5 ft and 8 ft in the right angle triangle.
Learn more about the right angle triangle here:
brainly.com/question/3770177
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