Answer:
Step-by-step explanation:
The 2 angles are complemantary or form right angles so

so

. Plugging that into BDC we get 11
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