A right triangle is created by the ladder and the wall.
The Pythagorean Theorem can be used to find the missing length. a² + b² = c² {the Pythagorean Theorem} a and b are the legs and c is the hypotenuse a² + 8² = 10² {substituted given values into the Pythagorean Theorem} a² + 64 = 100 {evaluated exponents} a² = 36 {subtracted 64 from each side} a = 6 {took the square root of each side} the ladder is 6 ft from the base of the wall H.) 6  Algebra House
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