Maryam Solarie
215048660
Cape Peninsula University of Technology - PGCE: FET course
Lengths, angles, triangles, circles, and all shapes play a major role in our lives, whether we realise it or not. Mathematics, as such, makes use of this more often than not.
Today, we will zoom in onto triangles, taking a deeper look at their angles and side lengths. In order for us to get a better understanding of trigonometry before we delve deeper into the topic of today's lesson, let's watch the following video:
Now that we've covered the basics of trigonometry and we know that we are dealing with right-angled triangles, let's look at the 3 basic trigonometric ratios.
So an easy way for us to remember these ratios is by remembering that the schoolboys went on a Soh Cah Toa (Soccer tour), where S is for sin, o is for opposite, h is the hypotenuse, C is for Cos, a is for adjacent and T is for Tan.
For this task, you will solve a few problems that deal with trigonometric ratios. This task will assist you to better understand the concepts and apply them to problem-solving. Use the resources provided to you to guide you when attempting the task. You may use external resources such as your textbook if it will help you understand the topic better. Have fun and good luck!
Resources:
https://intl.siyavula.com/read/maths/grade-10/trigonometry-part-1/05-trigonometry-part-1-02
https://byjus.com/maths/trigonometric-ratios/#:~:text=Trigonometric%20R….
https://www.texasgateway.org/resource/applying-trigonometric-ratios
https://physics.info/trigonometry/summary.shtml
Rubric for Assessing the Mathematics task on right-angled triangles
QUESTION |
Ratio used (side lengths) |
Ratio used (angle) |
Substitution (side lengths) |
Substitution (angle) |
Answer (side lengths) |
Answer (angle) |
TOTAL |
1 |
2 (1 per side) |
- |
2 (1 per side) |
- |
2 (1 per side) |
- |
6 |
2 |
2 (1 per side) |
- |
2 (1 per side) |
- |
2 (1 per side) |
- |
6 |
3 |
2 (1 per side) |
- |
2 (1 per side) |
- |
2 (1 per side) |
- |
6 |
4 |
2 (1 per side) |
- |
2 (1 per side) |
- |
2 (1 per side) |
- |
6 |
5 |
2 (1 per side) |
- |
2 (1 per side) |
- |
2 (1 per side) |
- |
6 |
6 |
1 |
- |
1 |
- |
1 |
- |
3 |
7 |
- |
1 |
- |
1 |
- |
1 |
3 |
8 |
- |
1 |
- |
1 |
- |
1 |
3 |
1 mark for attempting/completing the entire task
TOTAL MARKS = 40
This lesson dealt with an introduction to trigonometry and the 3 basic trigonometric ratios.
We saw the application of these ratios to real-life situations and we familiarised ourselves with the different ratios and its' application to find missing lengths and angles.
The task assisted us in understanding and applying the different concepts. The task consisted of 40 marks and will be used as a summative assessment.
In preparation for the next lesson, please watch the following video:
All videos in this lesson are obtained from Youtube.
The links to websites were obtained using the google search engine.
Links to any books were also obtained using the google search engine and is an online version. A hard copy of the same textbook could be used.
If you wish to know some more on trigonometry as a whole, you may watch this video:
Maryam Solarie
215048660
Cape Peninsula University of Technology - PGCE: FET course