The marked angles are opposite angles, and as such they have the same measure. So, we have
Subtract 2a and 11 from both sides to get
Divide both sides by 4 to get
Now that we know the value of a, we can compute the measure of the angles. We can also verify that the solution we found is correct by verifying that both expressions actually give the same result:
Answer:
NOT PROPORTIONAL
Step-by-step explanation:
The given two fractions are: and
.
Proportional fractions are those which have the same value when to reduced to the simplest form.
Consider two fractions and
.
We say they are proportional if .
Or, if then we can say the fractions are proportional.
Here the fractions are: and
.
LHS: 5 X 10 = 50.
RHS: 8 X 8 = 64.
Clearly they are not equal. So, we can say these two fractions are not proportional.