# Thread: Find all angles

1. ## Find all angles

Can't understand the top or bottom one. Can someone help me find the angles? I have no clue.

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2. 1+2=180-70-30-29=51
3=180-1-2=129

3. Originally Posted by yma16
1+2=180-70-30-29=51
3=180-1-2=129
Thanks, how did you get those numbers?

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4. Why were you given this problem? Homework? Friend?

If it were fair for you to have been given this problem, you would have been given sufficient information about triangles.

Can you tell me what an "Interior Angle" of a triangle is? You'll need to know that.
Do these internal angles have anu special properties? You'll have to know at least one.

Do some read and then tell us where those numbers came from. Here's a place where you can start. https://www.mathopenref.com/triangleinternalangles.html

5. Originally Posted by Denis
Looks like "1, 2, 3" means angle#1, angle#2, angle#3 ??????

S'gotta be the weirdest post I've seen
they are, as in the picture. I could only figure out 3.

I do not think there is enough info for others.

6. Originally Posted by happiness
Can't understand the top or bottom one. Can someone help me find the angles? I have no clue.
What do you mean by "can't understand" the two exercises? (I'm assuming the "ones" are exercises related to the two drawn figures.) To what "angles" are you making reference? When you say you "have no clue", does this mean that you're trying to "study" for a placement test, but haven't actually ever taken geometry, so you don't understand what the exercises mean?

For the first exercise, the drawing appears to be something along the lines of the following:

Code:
lines:

6x+18      /
g ------ ----/----
10y+2    /
/
3x+9y  /
h -------/--------
/
I am assuming that "g" and "h" are names for the two horizontal-ish lines. Is this correct? If so, are these lines meant to be parallel? If not, for what do "g" and "h" stand? Is the slanty line meant to be a transversal, or does it stand for something else? I'd thought that "6x + 18" and "10y + 2" weren't meant to be a fraction -- but the line between them does not appear to be connected to the rest of that horizontal-ish line, so maybe they are a fraction? Either way, for what do these expressions stand? How does "3x + 9y" relate? What are the instructions? Your subject line says to "find all angles", but no angles are labelled, which makes it kinda hard to know if you've arrived at the correct values (when checking in the back of the book).

For what I'm assuming is the second exercise, you have a drawing that looks kind of like this:

Code:
nested triangles:

/\
/70\
/    \
/      \
/        \
/          \
/     ..     \
/30  .' 3'.  29\
/  .'        '.  \
/.' 1          2 '.\
*--------------------*
Unfortunately, since no other information is provided (such as whether the outer triangle is isosceles; if "1", "2", and "3" are numbers of angles, or if they're [what I'm assuming are] angle measures, like "70", "30", and "29"), it would not appear that this question in answerable. Sorry.

7. Originally Posted by stapel
What do you mean by "can't understand" the two exercises? (I'm assuming the "ones" are exercises related to the two drawn figures.) To what "angles" are you making reference? When you say you "have no clue", does this mean that you're trying to "study" for a placement test, but haven't actually ever taken geometry, so you don't understand what the exercises mean?

For the first exercise, the drawing appears to be something along the lines of the following:

Code:
lines:

6x+18      /
g ------ ----/----
10y+2    /
/
3x+9y  /
h -------/--------
/
I am assuming that "g" and "h" are names for the two horizontal-ish lines. Is this correct? If so, are these lines meant to be parallel? If not, for what do "g" and "h" stand? Is the slanty line meant to be a transversal, or does it stand for something else? I'd thought that "6x + 18" and "10y + 2" weren't meant to be a fraction -- but the line between them does not appear to be connected to the rest of that horizontal-ish line, so maybe they are a fraction? Either way, for what do these expressions stand? How does "3x + 9y" relate? What are the instructions? Your subject line says to "find all angles", but no angles are labelled, which makes it kinda hard to know if you've arrived at the correct values (when checking in the back of the book).

For what I'm assuming is the second exercise, you have a drawing that looks kind of like this:

Code:
nested triangles:

/\
/70\
/    \
/      \
/        \
/          \
/     ..     \
/30  .' 3'.  29\
/  .'        '.  \
/.' 1          2 '.\
*--------------------*
Unfortunately, since no other information is provided (such as whether the outer triangle is isosceles; if "1", "2", and "3" are numbers of angles, or if they're [what I'm assuming are] angle measures, like "70", "30", and "29"), it would not appear that this question in answerable. Sorry.
Sorry for being lazy. I'm referring to all to all the angles in both separate exercises. G and H refer to the 2 lines. G is parallel to H.

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8. Originally Posted by happiness
Sorry for being lazy. I'm referring to each angle in both separate exercises. G and H refer to the 2 lines. G is parallel to H. I am currently taking Accelerated Geometry. The ones are the two seperate exercises. Posted a new picture. My bad for the inconvenience.

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9. Originally Posted by happiness
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Lied, I thought I could change the picture. Also the 3x+9y is a corresponding angle to 6x+18
and 10y +2 is also an angle measure. They're expressions for the angle measures. The 70,30, and 29 they're the angle measures for the quadralateral angle and the 3,2, and 1 are variables. The 2, and 1 refer to the smaller triangle angle measures. It's a quadrilateral because somehow the 3 is an angle of the larger angle making the larger triangle have 4 angles that add up to 360. Sorry for being clumsy.

10. Originally Posted by happiness
Sorry for being lazy. I'm referring to all to all the angles in both separate exercises. G and H refer to the 2 lines. G is parallel to H.
So, with respect to the first exercise, the picture is actually more like the following?

Code:
lines:

6x+18 /
G -->>-------/----
10y+2 /
/
3x+9y /
H -------/--->>---
/
The lines G and H are parallel (indicated by the ">>" notation), the slanty line is a transversal, "6x + 18" and "10y + 2" do not form a fraction, and you are needing to use angle rules to create equations that you can solve for the values of "x" and "y"...?

Assuming so, where are you stuck? You used the straight-line angle sum rule to create an equation from the top two expressions. You used some other rule to create a second equation using the first and third expressions, you simplified to get a system of two equations in two unknowns, applied whatever method they've given you for solving systems of linear equations, and... then what?

Please be complete. Thank you!

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