If the numbering of the angles is similar to this:
1 | 2
-----
3 | 4
5 | 6
----
7 | 8
Then none of the the choices are necessarily true.
The equations would have been:
1 = 4 = 5 = 8
2 = 3 = 6 = 7
3 + 5 = 4 + 6 = 180
Answer:

Step-by-step explanation:
We know that 
Also , 
So ,

Answer:
1. 69°
2. 97°
3. 145°
4. 150°
5. 128°
6. 74°
Step-by-step explanation:
To find the angle measure of the missing angle, we have to note that the angle measures of a quadrilateral will all equal up to be 360°.
If we know 3 out of the 4 angles and the sum of the angles, we can add up the angles we know then subtract that from 360.
<em>Number 1:</em>


<em>Number 2:</em>
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<em>Number 3:</em>
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<em>Number 4:</em>
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<em>Number 5:</em>
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<em>Number 6:</em>
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<em><u>Hope this helped!</u></em>