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#1 2017-11-03 01:34:43

emmakatecumbo
Member
Registered: 2017-09-22
Posts: 30

Need help for homework Geometry

These 6 questions I completed but I got wrong. Could someone please help me get the correct answers? Ill post what my teacher had to comment about my answers down below.

1. Refer to the image at the right. If angle 1 is 30 degrees, and angle 5 is 70 degrees, are the two lines
parallel? Explain.

1 should = 5 if they are parallel and had a transversel through them.


2. Refer to the image at right. If angle 2 is 30 degrees and angle 4 is 60 degrees, are the lines parallel?
Explain.

co-interior angles are supplementary and thus 6+4 should = 180. 30 and 60 obviously are
complementary, not supplementary.


3. Refer to the image at right. If angle 2 and angle 6 are both 70 degrees, are the lines parallel? Explain.
I have no clue what the answer is for this one.

5. What is the measure of the inner angle of a regular hexagon? Show your work (and be sure to explain
anything you deem necessary to make sure your work is clear.)

A. A hexagon has 6 sides.
180 x 6 = 1080
The sum of the angles of deviation is 360
SO
1080 360 = 720
The final answer is 720


6. What is the measure of the inner angle of a regular decagon? Show your work (and be sure to explain
anything you deem necessary to make sure your work is clear.)

A. A decagon has 10 sides.
180 x 10 = 1800
The sum of the angles of deviation is 360
SO
1800 360 = 1440


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.


To get my scale factor, I will need to divide the two polygons. This is how I
will do it along with the answers for each number:
4 / 8 = 1/2
3 / 6 = 1/2
5 / 10 = 1/2
3 / 6 = 1/2
So now we know the scale factor is 1:2.


10. A right triangle has a 90 degree angle, and an angle x. What will the measure of the third angle be?
I believe the answer for this would be 90 x.

Teachers comments on my work :
#1-3    Now state whether or not the lines are parallel
#5-6    What is the measure of ONE angle?
#7    and what is the OTHER possible scale factor for these measurements?
#10    90x means 90*x...  that is incorrect... is there another relationship between 90 and x?

THE LINK TO THE DIAGRAM IS
https://postimg.org/image/7zi8v9g2hn/

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