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Mathematics 7 Online
OpenStudy (anonymous):

A ramp leads up to a building. The top of the ramp is 4 feet above the ground, and the bottom is 14 feet from the building, What is the length of the ramp? Round your answer to the nearest tenth of a foot. A. 14.6 ft B. 18.6 ft C. 18 ft D. 10 ft

OpenStudy (anonymous):

OpenStudy (anonymous):

plz help

OpenStudy (whpalmer4):

Do you know the Pythagorean theorem?

OpenStudy (whpalmer4):

|dw:1369421612890:dw| If you have such a triangle (and you do), then the following is true: \[a^2+b^2=c^2\]

OpenStudy (anonymous):

a little

OpenStudy (whpalmer4):

Compare your diagram with mine. Can you identify the values of a, b, and c? One of them is the unknown you need to find, and the other two are provided by the problem statement.

OpenStudy (whpalmer4):

Have you figured out which value is a and which is b?

OpenStudy (whpalmer4):

Come on, work with me here. I drew the triangle in the same orientation to make it easy to match them up.

OpenStudy (anonymous):

a b c d

OpenStudy (whpalmer4):

Look at the diagram in the problem! It has a long, slanted triangle on the right, representing the ramp. I drew a long, slanted triangle, labeled with letters. I need you to look at the diagrams and tell me what numbers from the problem correspond to letters on my diagram.

OpenStudy (anonymous):

a b c d

OpenStudy (whpalmer4):

There's no d on my diagram. There are 2 numbers on the problem diagram. One of them is 4, the other is 14. Which letter on my diagram corresponds to the side marked 4? Which letter on my diagram corresponds to the side marked 14? Which letter on my diagram corresponds to the length of the ramp?

OpenStudy (anonymous):

A. 14.6 ft B. 18.6 ft C. 18 ft D. 10 ft

OpenStudy (whpalmer4):

Those are your choices for answers. I'm not going to tell you the answer, but I will help you find it yourself. Can you see the diagram I drew? I've reposted it in this message. |dw:1369424203155:dw|

OpenStudy (anonymous):

y not

OpenStudy (anonymous):

I don't get this at all I have 2 mins left

OpenStudy (anonymous):

on test

OpenStudy (whpalmer4):

Why am I not going to just tell you the answer? That's not the point of OpenStudy. Here: your two sides are 4 and 14 ft respectively. Pythagorean theorem says the hypotenuse (the ramp itself) will be the square root of 4^2 + 14^2. If you can't figure it out, you've got a 1 in 4 chance of guessing correctly.

OpenStudy (anonymous):

can we talk more after test

OpenStudy (whpalmer4):

Sure. I'm happy to help you learn this stuff, but not happy to supply test answers :-)

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