The 3 angles inside a triangle will always have a sum of 180 degrees. Name the triangle as an obtuse triangle if any of the angles are greater than 90 degrees. An obtuse triangle will only have 1 obtuse angle. Classify the triangle as a right triangle if the triangle possess a right angle of 90 degrees. A right triangle will only have 1 right angle. Categorize the triangle as acute if all 3 of its angles are less than 90 degrees. Determine that the triangle is equilateral if all 3 of its angles, (which would have to be acute), are congruent. In an equilateral triangle, all 3 of the angles will be 60 degrees, because the sum of the 3 interior angles in a triangle is always 180 degrees.
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One-sentence summary -- Use a protractor to measure each of the 3 interior angles of the given triangle. Record the measurement of each angle in degrees. Distinguish if the angles are right, acute or obtuse according to their measurements. Classify the triangle according to the measurement and the type of angles.

When you're playing defense, your goal is to keep your opponents from scoring. That means you need to disrupt passes, try to steal the ball if possible, and block shots. It's your job to be annoying, sticky, and disruptive to the other team's ability to pass and score points. Most teams will play "man-to-man" defense, which usually means that you'll be matched to another player on the opposing team, who you'll guard for the rest of the game. This is, in most cases, the player who also plays your position. In more advanced basketball, sometimes a "zone" defense is used, in which you'll be given an area of the court to guard, and you'll pick up any player who moves into it. Think of it like an imaginary bubble that you're trying to protect. . Basketball isn't all about offense, and your game needs to be fluid on both sides of the ball. To learn to play sticky defense, learn to get low and get wide. Crouch, with your feet more than shoulder-width apart and put your arms straight out at your sides, extending and making yourself as wide as possible. Stand on the balls of your feet and make sideways movements to guard the player with the ball. Lock your eyes on the ball. Aim your lead hip toward the side-line, and your back hip toward the hoop that you're defending. You want to make it as difficult as possible for the person you're guarding to get between you and the hoop, so it's more effective to "push" them by aligning your hips properly. With some practice, this will become second-nature. The hardest thing about playing defense is staying in your defensive crouch and trying to stick to the offensive player like glue. It's hard to move side-to-side quickly, so the more experienced you are at doing the side-to-side shuffle step, the better a defensive player you'll be. Practice running sideways, taking a big step to the side in one direction, crossing your trailing foot just behind your lead foot, and pushing off again. Then, go back the other way. Practice this until your legs are sore. Most coaches will train players by dribbling from side to side, and defenders switching their positioning depending on how the offense moves. You can practice this yourself, sliding around laterally in the driveway at home. Beginning basketball players often make a common mistake: jumping in the air too much. It's tempting to try to block your opponent's shot by jumping in the air with your arms outstretched every time it looks like they're going to shoot, but train yourself to keep your feet on the ground as much as possible. It's very easy to pump-fake, going up for a shot and pulling it back down as soon as you take off into the air, leaving you vulnerable and useless as a defender. Instead, train yourself to stand up very straight when you see your opponent pull it down to shoot, and throw your arms straight up in the air 90 degrees. This will be just as disruptive as a jump, and you'll still be locked down ready to play defense, if need be. Another essential part of playing defense is training yourself to grab the rebounds when they come. If your opponents have taken a shot that's failed, don't let them have a second chance for it. Post-up down by the basket and grab the ball when it bounces free. If it's up for grabs, be the one to grab it. While charging into a defender will earn you a foul on offense, most fouls that happen are called on the defense. In your attempts to be a disruptive presence on the court, you've also got to learn where the line is and avoid crossing it, or you're going to get a foul called. Hitting, pushing, or slapping at the arms of opposing players will be a foul every time. Keep your eyes focused on the ball. If you touch the ball, it can't be a foul. Reaching out and grabbing an opponent will earn you a foul. If you've gotten beat off the ball, you can't cheat by reaching out for the jersey and grabbing it.
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One-sentence summary -- Learn your role on defense. Learn the correct defensive stance Practice your side-to-side movements. Stay on your feet as much as possible. Grab rebounds. Avoid fouls.

In their natural habitat, bettas live in murky, stagnant water. Although they can survive in very small, cramped tanks, it's healthier for the fish to give it a larger environment. Look for a tank that is holds around five gallons of water, as this will give the fish plenty of space. Do not keep your betta in a tank smaller than one gallon. Since betta fish breathe air directly from the top of the water, your tank does not need a filtration system. In fact, it's better if the tank doesn't have onethe current created by the filtration is stressful to bettas. . Wash the fish tank thoroughly and then rinse the gravel carefully in hot tap water. Do not use soap or detergent on the gravel. Then layer the gravel carefully at the bottom of the tank. Rinse any decorations and put them into the tank. The tank does not necessarily have to be a traditional fish tank; any large container will do. It's important that you include gravel in the fish tank. Opt for a neutral color, and for relatively small-grained gravel. The neutral color will calm your betta, and bacteria that build up on the gravel will digest your fish's waste and keep the water relatively clean. Do not use mineral water in the tank, since it lacks important minerals that your betta fish will need. It's important that, when filled with tap water, your fish tank will have plenty of surface area at the top. Betta fish do breathe underwater like most fish, but come up to the surface for an extra gulp of air at times. For this reason, a narrow-topped container like a wine bottle does not make a suitable tank for a betta. A conditioner will remove chlorine (which is unhealthy for fish) from your tap water, and also filter out other impurities and heavy metals. Follow the instructions on the conditioner bottle, and remember to add this as you fill the tank with water. You'll also need to add conditioner every time you change the water in the fish tank (roughly once a week). If you bought your betta at a pet store, you should have received a water conditioner specifically made for bettas. If you were not given one, you'll need to purchase a conditioner on your own. Conditioners should be available at any pet store, and can also be easily purchased online. The amount of conditioner that you use will vary based on the size of your fish tank. Follow the directions on the bottle regarding the amount of conditioner to use, and the amount of time to let it mix in the water before it's safe for your fish. If you live in a rural area where the tap water is not chlorinated, you may not need to use a conditioner. Some conditioners get rid of heavy metals though, so you can use it if you need.
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One-sentence summary --
Choose a tank for your betta. Prepare the tank Fill up the tank with tap water. Purchase a water conditioner.