Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#1 2012-10-03 08:43:45

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

checking if answers are correct

Hi I was wondering if my answers for the following are correct and I need help answering
number 8 please.

7. Polygon A has sides of 4, 3, 5, and 3. Polygon B has sides of 8, 6, 10, and 6. What are the two possible scale factors here? Explain.

7. In lesson #8 the first example says to divide the bigger polygon's sides by the smaller polygon's sides, but in example 3 it just divides the first angle from A with first angle from B but B angles are bigger than A angles. I am going to do the same thing example 3 did and here is my answer:

To get the scale factor first I have to divide the sides by each other like this:

4/8 = 1/2
3/6 = 1/2
5/10 = 1/2
3/6 =   1/2
So, the scale factor is 1:2

8. A triangle has angles of 34 degrees, 56 degrees, and 90 degrees. It also have sides of 6, 8, and 10. Which side is across from which angle?

9. A triangle has one angle measuring 52 degrees, and one angle measuring 18 degrees. What is the measure of the third angle?
9. Triangles must add up to 180 degrees. 52+18=70
180-70= 110 therfore the measure of the third angle is 110

10. A right triangle has a 90 degree angle, and an angle x. What will the measure of the third angle be?
10. Trangles must add up to 180 degrees. So the equation would be 90+x+A=180
A is representing the measure of the third angle.

90+x+A=180
Subtract 90 from both sides of the equation.
A+x=90
Subtract 'x' from each side of the equation.
A=90-x

Thanks big_smile


One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

Offline

#2 2012-10-03 08:46:41

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,719

Re: checking if answers are correct

Hi;

8) I get 10 is the hypotenuse so it is across from the side with a length of 10. You can get the next two sides and angles.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#3 2012-10-03 09:34:37

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: checking if answers are correct

whats a hypotenuse we didnt learn about that yet so does that have any thing to do with finding interior and exterior


One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

Offline

#4 2012-10-03 09:36:46

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,719

Re: checking if answers are correct

Hi;

A hypotenuse is the side of a right triangle ( one having a 90° angle in it ) that is opposite to the 90° angle.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#5 2012-10-03 09:49:44

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: checking if answers are correct

ok so do i have to divide one side by another or what am confused like what do I do?any formula to follow?


One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

Offline

#6 2012-10-03 09:51:16

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,719

Re: checking if answers are correct

The biggest side will be opposite the biggest angle. I have given you the first side of 10 is opposite the 90°. Can you get the next two?


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

#7 2012-10-03 09:56:38

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: checking if answers are correct

34 degrees, 56 degrees, and 90 degrees. It also have sides of 6, 8, and 10.

34 with 6
56 with 8
90 with 10
ooooh  just like we divide these two to get the scale factor


One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

Offline

#8 2012-10-03 10:01:53

zee-f
Member
Registered: 2011-05-12
Posts: 1,220

Re: checking if answers are correct

Thanks a lot big_smile


One, who adopts patience, will never be deprived of success though it may take a long time to reach him. Imam ali (as)<3

Offline

#9 2012-10-03 10:08:07

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,719

Re: checking if answers are correct

8) Does not give you another triangle so there is no scale factor.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

Online

Board footer

Powered by FluxBB