Answer:
Step-by-step explanation:
Join OB.
∠A=∠A (common)

∴ ΔAPO and ΔAOB are similar.

∠P=∠O
∠Q=∠B
So PQ║OB
Similarly RS║OB
∴PQ║RS
Answer:
c. 20%
multiply both the numerator and denominator by 10, to get 20/100 making the percentage 20
Hi!
We can see the river is a straight line.
This means that the angles that fall upon it are supplementary angles, and will add up to 180 degrees.
Therefore:

Combine like terms:

Subtract 21 from both sides:

Divide both sides by 3:

Therefore, the value of x is 53 degrees.