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

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

### Need help for homework Geometry

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

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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