Answer:
ladder is leaning against a building so that the distance from the ground to the top of the latter is 1 foot less than the length of the latter find the length of the latter if the distance from the bottom of the ladder to the building is 9 feet
Step-by-step explanation:
Let :
Length of ladder = l
Height = l - 1
distance from the bottom of the ladder to the building, d = 9 feets
Lenght of ladder = hypotenus
l² = height² + distance²
l² = (l - 1)² + 9²
l² = l² + 1 + 9²
l² = l² + 1 + 81
l² = l² + 82
