Trigonometry

In math class, we are learning about trigonometry. From yesterday’s lesson, we learned that it is about a relationships involving lengths and angles of triangles.

 

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The longest side, AB, is called the hypotenuse (hyp).

The side opposite the angle of A, AC, is called the opposite (opp).

The third side of the triangle, BC, is called the adjacent (adj).

Sin A = opposite / hypotenuse

Cos  A= adjacent / hypotenuse

Tan  A = opposite /  adjacent

 

When using calculators, I could know the ratio by pressing the buttons ‘sin’, ‘cos’, or  ‘tan’ .

To know the angle, I would press the buttons ‘sin-1’, ‘cos-1′, or tan-1’.

 

Measurement

Today in math class, we started learning about measurements. We went outside and found objects that can be used to measure the length and volume. My partner and I found 2 branches, a cup, and some little plastic sticks. We then, tried to measure our height by using the objects that we found. My height was almost 5 times the branch. When we finished talking about measurements, we went back to our class and watched two videos, one was about the history of measurement, and the other one was about history of numbers. Today’s class was really fun and it was a great way of learning about measurements. I could understand very easily.