Answer:

Step-by-step explanation:

Adding 2a to both sides

Taking sqrt on both sides

Answer:
If you rotate an angle 360 degrees around, your final angle will be facing the same direction
Thus, the coterminal angle is 
Step-by-step explanation:
I'll do the first problem as an example.
∠P and ∠H both have one mark. That means they're congruent.
∠T and ∠G both have two marks. So they're congruent.
∠W and ∠D both have three marks. So they're congruent.
So we can write a congruence statement:
ΔPTW ≅ ΔHGD
We can write more congruence statements by rearranging the letter, provided that corresponding pairs have the same position (P is in the same place as H, etc.). For example:
ΔWPT ≅ ΔDHG
ΔTWP ≅ ΔGDH
What is The area of A rectangle ABCD in square units is going to be p=a+b+c