Answer:
145
Explanation:
Angle 4 would be equivalent to 1, which means that 1 and 4 would equal 70.
In a circle the angles must equal 360.
So you would do 360 - 70 which equals 290.
The same rule for angles 1 and 4, applies to 2 and 3.
So you would half 290.
Thus, the answer would be 145 degrees.
Hope this helps :)