Problem: How does the next paragraph end?

How to prove similar triangles
Define the angle-angle (aa) theorem.
Two triangles can be proved similar by the angle-angle theorem which states: if two triangles have two congruent angles, then those triangles are similar.
This theorem is also called the angle-angle-angle (aaa) theorem because if two angles of the triangle are congruent, the third angle must also be congruent.
A: This is because the angles of a triangle must sum to 180 . Identify the measure of at least two angles in one of the triangles.

Problem: How does the next paragraph end?

How to cancel an appointment
Contact the person your appointment is with as soon as you can.
The longer you wait to cancel your appointment, the more you are inconveniencing the person you are meeting with. Giving plenty of notice will show that you respect them and their time.
A: Call to cancel your appointment personally if you are giving short notice. If you are giving less than a day's notice, you should call the person your appointment is with directly.

Problem: How does the next paragraph end?

How to plant turing sunflowers
Choose an area that gets 6-8 hours of direct sunlight.
As their name suggests, sunflowers love the sun! They even grow to face it. Your sunflowers will enjoy a sunny spot in your yard where they can soak up the rays they need to thrive.
A: Use a loose, well-draining soil. Sunflower roots are long and tend to stretch deeply into the soil.

Problem: How does the next paragraph end?

Nother shot is shown of a train of kids on inner tubes going down the hill. A child's face is shown as he is speaking to the camera. they
A:
then slide down the hill very fast and they are excited.