Today in math class, we’re making a blog post to introduce to you guys about measurement. At first let me introduce the unit question and the area of interaction. The unit question is called “How can we calculate using measurement” and the are of interaction is that we’re going to relate to during this unit is “Environment”. I think that measurement can be used in many environments because you have to be able to measure things in our daily lives. (e.g. supermarket: you need to measure how much you can buy with the money you already have.)
Moving on, I’m going to tell you three questions for this unit. One is a factual question (a fact), one is a conceptual question (how to do something) and one is a debatable question (something which may have more than one answer). The factual question for me is “What is a nanometer?”, the conceptual question is “How do we convert kilometers to tons?” and the debatable question is “Is it better to use centimeters or meters?”
These are where you can find measurement in our daily lives:
The clock is one thing that measures something. A clock is an helpful thing that measures time in seconds, minutes and hours. Wow, isn’t that really new to you?
The air conditioner and heater is also a thing that measures something. It measures the temperature of the room and can measure in °c (celsius) or °f (fahrenheit). You might notice that there’s “Bearded Perry” sticking his head out on the side.
The ruler is another thing that measures something. The ruler can measure the length of an object in centimeters, meters, inches, etc. Again, if you might notice there’s the same Perry on top of the ruler.
As you’ve now seen from these pictures and learned few new things about measurement, let’s talk about how to find the area of a square or a rectangle. To find out the area, you need to multiply the length times the width. There’s an example shown below.
In this example of a rectangular shape, the length is 7cm long and the width is 16cm wide. To be able to find the area, you need to do 7cm × 16cm which equals to 112cm2. But, it’s most important to not forget the 2 at the right side top of the cm sign. If you don’t write 2, it will just show the length of the shape and won’t exactly show what the area is. So that’s how you can find the area of a square or a rectangle. That might’ve been a great explanation, right? Well I hope it was.
Ok so next is like the same, but it’s the area of a triangle were going to find. For a triangle you need to multiply the base (bottom of triangle) times the height and divide it by 2. Here’s an example of it again.
In this example of a triangle, the base is 10cm and the height is 9cm. When you multiply those two, it becomes 90 and when you divide it by 2, it turns into 45cm2. The reason why we divide it by 2 is because a triangle is a half of a rectangle in which it is the rule. The 2 on the top of the cm sign is the same with the rectangle, although the way you try to find the area is different with the way of doing the rectangle.
This might be getting exhausting, but I have to also explain how to find the volume of a 3D square or rectangle. Below is an example of it.
This example is a 3D figure of square. To find out the volume of it, you need to multiply all 3 sides, length, width and height. For this one, you need to do 6cm × 6cm × 6cm. Then you can get the answer of it which is 216cm3. At the top of the cm sign for this, you need to put a 3 to show it equals to the volume. This is what you need to know mostly about it and it will be really useful in our life.
For next, I’ll talk about what’s good and bad about measurement. I think that measurement is good for measuring lots of things like time, temperature and distances. But I do think it’s also bad because you can find out how much you weigh. If your someone that eats a variety of junk food, you might find out that you weigh a lot and get shocked. It could make you eat more and more which eventually will lead you to getting way fatter than before. I bet that’s not what they want.
In conclusion, I’m satisfied with having measurement in our life. There are many advantages that help us do things much better and can give us a convenient time. So after all I think it’s something essential for everyone in this world.