Math round 4
It has been an amazing round learning about percentages and angles. I love learning percentages since I was in grade 4 because in my perspective, it is easy to understand and a very handy way of writing fractions. Percentage can be compared more easily than fractions, and it is short and easy to remember because the number of percentages are mostly used from 1 to 100, so you don’t have to remember a lot of numbers. Percentages are also useful in the way that we use to look at the increasing and decreasing. For an example: if we want to look at how many people have died due to the traffic accident between 2016 and 2017, the only way that is easy for us to know is looking at the percentage. If it says “From 2016 and 2017, the number of people that died due to the traffic accident has increased by 10%”, so by looking at that percentage, we know that it does not decrease that much. Percentages are now over and heads up to Angles.
Learning angles is a little hard for me because I am not really good at it, but I told myself that “you are going to be an Angles master one day”. I know that I am not good at it, so I try to work on both the exercises about angles in the book and on Khan Academy. Doing exercises more and more help me a lot with Angles, so now I am pretty good at it. In geometry, an Angle is a place where two lines intersect and the until of an angle is degree. There are many types of angles that we name in mathematics and I will define them below.
- Right: is an angle that is exactly 90 degrees
- Straight: is an angle that is exactly 180 degrees
- Acute: is an angle that is less than 90 degrees
- Obtuse: is an angle that is greater than 90 degrees and less than 180 degrees
- Reflex: is an angle measuring greater than 180 degrees and less than 360 degrees
- Vertically opposite: is an angle opposite each other when two lines cross and they are always equal.
- Complementary: Two Angles are Complementary when they add up to 90 degrees
- Supplementary: is an angle that make a straight line and measures add up to 180 degrees.
- Angles around: is an angle that is always add up to 360 degree