Step-by-step explanation:

Answer:
∠APC ≅ ∠DPB angles adjacent to the same angle are congruent to each other.
Explanation:
Because they share an angle created by P, they are adjacent.
I hope this helped :)
Answer:
Answer:

Step-by-step explanation:
Give letters, as in the attached image.
The triangles ABE and CDE are similars (AAA). In particular 
Answer:
D)90
Step-by-step explanation:
First you work out 3^4 which is 81.
Then add 9 to it and it becomes 90.