How did ancient Egyptians construct right angles?

Answer 1

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Answer 2

Egyptian were great mathematicians. They were able to construct true squares to help measure the right angles or use the calculations from the Pythagorean Triangle to establish the right angle.

Answer 3

Exercise shouldn't be jumped into, nor stopped suddenly. Your body will work best if you perform both a warm-up and a cool-down.

The Warm-Up

Whether you are about to lift weights or go for a run, warming up is important before you begin. The warm-up is meant to warm-up your muscles, increase blood flow and reduce your chance of injury. Prior to a cardio workout complete 5 to 10 minutes of the same mode of exercise at a much lighter intensity. For example, if you are going for a run begin by walking, then pick it up to a jog pace, and after about 5 minutes proceed into your run. Before your strength training workout you should also complete 5 to 10 minutes of a cardio warm-up. This can be on the treadmill, bike, elliptical, etc. After the cardio warm-up it is also helpful to do a warm-up set of repetitions. For example, on the leg press, before pressing 200 lbs., put on 100 lbs. and perform more reps of this lighter weight to get the specific muscles prepared. Additionally, some people prefer to stretch before a workout, so if you choose to, only complete the stretch after the warm-up, as your muscles will be more responsive when they are warm. Stretching “cold” muscles can result in injury.

The Cool-Down

A cool-down consisting of light cardio and stretching is recommended after both strength training and cardio workouts. A cool-down is meant to slowly lower the heart rate and prevent muscles stiffness. After performing a cardio workout complete another 5 to 10 minutes of the same exercise at a lighter intensity. Ideally, you want to make your heart rate slow down to less than 120 beats per minute before you stop exercising completely. The act of continued muscle movement, especially from the legs, helps to pump the blood back to the heart, whereas if your heart rate were elevated and you stopped suddenly it would be much harder for your elevated blood volume to circulate back to the heart. After the cardio cool-down, perform a full-body stretch. There are many stretching techniques but a simple way to complete it is to hold each stretch for 20 to 30 seconds, no bouncing.

Answer 4

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Answer 5

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