In one sentence, describe what the following article is about: The vertex is the point where the two line segments or rays of the angle meet. If you are looking at an angle in a math book or worksheet, this point is likely already labeled. If you are drawing your own angle, you can label this point using any letter. For example, you might have an angle with a vertex at point C. Usually these points are plotted near the end of the line or ray. Again, these will likely be labeled for you, but if you are creating the angle, you can label them however you like. For example, on the top ray of the angle, you might have point A. On the bottom ray of the angle, you might have point B. This is simply a small representation of an angle (∠{\displaystyle \angle }). Using this symbol will help differentiate an angle from a triangle the angle might be a part of. The convention is that the vertex point is the middle letter in the angle label. So, if you are reading the name of an angle, you generally read it from the point on the top ray, to the vertex, to the point on the bottom ray.  For example, an angle with a vertex C, and a point A on the top ray, and the point B on the bottom ray, would be labeled ∠ACB{\displaystyle \angle ACB}.
Summary: Identify the vertex of the angle. Identify one point on each line segment or ray. Draw the angle symbol. Label the angle using the vertex and the two points.

In one sentence, describe what the following article is about: If the puppies in a litter have fleas, then it's almost certain that the mother will have them too. As a result, it will be necessary to treat the mother in order to avoid reinfecting the puppies. Keep in mind that if there are any other animals in the house that have come in contact with the mother dog or puppies, they will need to be treated for fleas also. Although anti-flea products can be used on the mother, it is important to be careful about the products you choose.  If the mother is still providing milk for her puppies, certain chemicals can be passed onto the puppies through the milk, which could make them sick. Therefore, it is essential that you only use prescription products designed for use in lactating mothers. Some store bought products may be marked as "natural" or "drug free", but this does not mean that they are safe for very young puppies. And even if they don't cause any negative side-effects, natural or herbal products are unlikely to be effective in getting rid of fleas. Prescription medications that contain an ingredient called selamectin (such as Revolution and Stronghold) are licensed as being safe for use in pregnant and lactating mothers.  The medication should be applied to the adult dog's skin, according to the manufacturers' instructions, and allowed to dry for several hours before the puppies are allowed to come in contact with the mother. Selamectin-based medications should only be given in the recommended dosages, and should only be administered topically. When given orally, selamectin was shown to cause foetal abnormalities in rats. There are several ingredients used commonly in anti-flea medications that should never be given to pregnant or lactating dogs. Therefore, it's important to read the label very careful or consult with your dog's vet to avoid using products containing these ingredients.  An ingredient called fipronil (which is found in an anti-flea product called Frontline) should never be used on pregnant or lactating mothers, as it has not been proven safe for puppies. An ingredient called spinosad (which is used in an oral flea treatment call Comfortis) has been shown to be excreted in the mother's milk. As it is uncertain whether spinosad causes negative side effects in puppies, you should avoid using this product to treat the mother.
Summary: Understand why it is necessary to treat the mother. Only use prescription products, avoid over-the-counter or "natural" medications. Use selamectin-based medications on pregnant and lactating mothers. Avoid using medications containing fipronil and spinosad, as these are unsafe for lactating mothers.

In one sentence, describe what the following article is about: You can also break them up with your hands as well. If you can't find any crackers, you can use biscuits or light-colored cookies (ie: vanilla wafers, sugar cookies, graham crackers, etc.). Don't use chocolate chip cookies or Oreos—those are way too dark! You can use a bowl, sink, plastic bag, or even a toilet. If you want to make more vomit, chew up and spit out more crackers. If you spat the crackers into a toilet, you don't need anymore water. If you spat them into a bowl, bag, or sink, then add in a little water. This makes the vomit look more real. You can also try some white vinegar, apple cider vinegar, apple juice, or even a little milk. Wet cat food or wet dog food work great for this. You can also use a little bit of canned tuna or baby food. It will help make the vomit look (and smell!) more real. You could also chew up some cereal, spit it out, then mix it with vinegar. Add some on the toilet seat. It'll look like you missed! If you used the toilet, don't flush it! If you left it in a bowl or trash bag, you could take it to a parent, guardian, or teacher, and say that you threw up.
Summary:
Chew up some crackers. Spit the crackers into a plastic bag. Add some water, if needed. Add something mushy and smelly. Leave the vomit for someone to find.