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 Indigo28 October 29th, 2017 11:46 AM

Calculating Missing Angles

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Hi,

So for my geometry%2

 skeeter October 29th, 2017 12:06 PM

http://mymathforum.com/attachments/g...oncept_act.jpg

not saying this is an exhaustive list, but from an initial glance it looks as if there are ...

1. pairs of vertical angles

2. linear pairs of angles

3. angles formed by parallel lines cut by a transversal ...

a. corresponding angles
b. alternate-interior angles
c. same-side interior angles

4. interior angles of a triangle

... are you familiar with these angle relationships?

 Indigo28 October 29th, 2017 12:08 PM

Quote:
 Originally Posted by skeeter (Post 583184) http://mymathforum.com/attachments/g...oncept_act.jpg not saying this is an exhaustive list, but from an initial glance it looks as if there are ... 1. pairs of vertical angles 2. linear pairs of angles 3. angles formed by parallel lines cut by a transversal ... a. corresponding angles b. alternate-interior angles c. same-side interior angles 4. interior angles of a triangle ... are you familiar with these angle relationships?
Sort of- I'm still trying to grasp these concepts, but I am somewhat familiar with what you're talking about.

 Indigo28 October 29th, 2017 12:43 PM

So far, I've got:

Angle 1: 47 degrees ( because Angle 1 and the angle measuring 47° are vertical, so they are also congruent.)

Angle 18: 90 degrees (because there is a right angle sign and all right angles measure 90 degrees).

Are angles 2 and 3 a linear pair? What are angle 1 and 3 to each other?

 skeeter October 29th, 2017 01:13 PM

Quote:
 Originally Posted by Indigo28 (Post 583197) So far, I've got: Angle 1: 47 degrees ( because Angle 1 and the angle measuring 47° are vertical, so they are also congruent.)
no ... angle 3 and the 47 deg angle are vertical angles, so angle 3 = 47 deg

Quote:
 Angle 18: 90 degrees (because there is a right angle sign and all right angles measure 90 degrees).
yes

Quote:
 Can anyone answer these questions: Are angles 2 and 3 a linear pair? What are angle 1 and 3 to each other?
no ... linear pairs are 6 & 7 , 8 & 9, 15 % the 128 deg angle, etc ...

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