8
15 meters, or less, depending on the angle.
13.6 feet
16
This question is where you use the Pythagorean Theorem. Go to http://en.wikipdedia.org/ and search for Pythagorean Theoremif you don't already remember what it is, and good luck.
Yes, there would. For example, how high a ladder do you need to reach the roof? Answer is the difference between the roof height and your reach.
8
10.9 [11]
30 feet. And you don't have to round it to the nearest foot. It's exactly 30 feet.
18
14
Arthur Pythagoras rules! 12 x 12 = 3 x 3 + x2, so x2 = 144 - 9 and x = sqrt 135 = 11.62 so to the nearest foot it reaches 12 feet (actually 11.62)
9.2
1. He climbed up the ladder to get the book off the bookshelf in the library. 2. I climbed the ladder to paint the house. 3. She used a ladder to reach the top of her bookshelf.
The main purpose of a ladder is to allow people to get higher than they can reach. A ladder works by leaning it up against a solid surface and then the person climbs the ladder using the rungs.
Round the base angle to 70 degrees and use the sine ratio: 30*sine 70 degrees = 28.19077862 feet Height of ladder from the ground = 28 feet to 2 s.f.
15 meters, or less, depending on the angle.
Sofi needs a ladder to reach high places that she cannot reach on her own.