From the condition, we know that one of the angles formed at the intersection of two straight lines is 30 °.
So, let’s first of all remember what angles are formed when two straight lines intersect.
When straight lines intersect, vertical angles are formed – they are equal to each other. Adjacent corners are also formed.
In our problem, we are talking about adjacent corners. Their sum is 180 °.
Then the unknown angles will be denoted by the variable x;
x + 30 = 180;
x = 180 – 30;
x = 150 °;
So, one pair of vertical angles is 30 °, and the second is 150 °
Answer: 30 °; 30 °; 150 °; 150 °.
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