geometry
posted by rose .
how far from the wall should he place the ladder? If his ladder is 13 feet long and has to reach a 12 feet window.

hard way:
12^2 + d^2 = 13^2
d = 5
easy way: recognize that you have a 51213 right triangle.
Respond to this Question
Similar Questions

help quick!!!
a ladder leans against a awall.The top of the ladder is 8 feet above the ground. If the botttom of the ladder is then moved 2 feet farther from the wall, the ladder will lie on the ground with its toptouching the wall. How long is … 
math
A ladder leans against a brick wall, The top of the ladder touches the wall 10 feet from the ground. The ladder is 15 feet long. How far does the bottom of the ladder sit from the wall? 
geometry
A ladder is propped against a wall. If the top of the ladder reaches 18 feet up the wall and the base of the ladder is 6 feet from the base of the wall, how long is the ladder? 
Geometry/trig
A ladder, 17 feet long, leans against a wall at a 49 degree angle to the ground. How far up the wall does the ladder reach? 
Intermediate Algebra
A fire is raging in an apartment house. you see kids in a window in an upstairs window. the window is 24 feet off the ground. you have a ladder, but it only extends to 30 feet, how far from the house must you place the ladder to reach … 
math word problem
sam needs to clean the window on his house. he has a 25foot ladder and places the base of the ladder 10 feet from the wall of the house. A) how high up the wall will the ladder reach? 
calculus
a ladder 6 feet long leans against a vertical building. the bottom of the ladder slides away from the building horizontally at rate of 1/2 ft/sec. A) at what rate is the top of the ladder sliding down the wall when the bottom of the … 
geometry
A painter sets a ladder up to reach the bottom of a secondstory window 16 feet above the ground. The base of the ladder is 12 feet from the house. While the painter mixes the paint, a neighbor's dog bumps the ladder, which moves the … 
Basic math
A 15 foot ladder propped against a wall the base of the ladder is 3 feet from the wall how far up the wall does the ladder reach. 
Math
A ladder is needed to reach the top of a second floor window, A distance of 20 feet above the (level) ground. According to the directions on the ladder, the distance between the bottom of a leaning ladder and the base of the (vertical) …