2. Hello! I’m Larry the magical Leprachaun. I LOVE to learn and explore. Come and take a trip with me and my magical hat. We will explore Mr. Harvey’s classroom. I think he is talking about triangles today. Come along!!! Click on my picture to move through the journey!
3. Good Morning Class! I am going to teach you about triangles today. I hope you enjoy our lesson! Let’s take a look at today’s problem! Here we are in Mr. Harvey’s classroom. He is teaching about triangles today! Here we are in Mr. Harvey’s classroom. He is teaching about triangles today!
4. This is today’s problem. I am not sure how we are going to do this.
5. I’m not sure what that means. I hope he makes this clear.
6. These are all right angle triangles. Mr. Harvey told us these are corresponding. That means they are equal.
7. Mr. Harvey labeled each corresponding angle for us. Each triangle has three angles. A is a 90 degree angle and is the same in each triangle.
8. Angle B in each triangle is equal to each other too. Equal angles cause corresponding sides.
10. Mr. Harvey labeled all three sides of the top triangle. If we know that the bottom line equals 6 and the bottom line of the small triangle equals 3, the small triangle would be half the size of the other triangle. What are the other lines of the small triangle?
11. You are right! The longer line equals 5. Half of 10 equals 5. Half of 8 equals 4. Remember the top triangle is twice the size of the bottom triangle. You are starting to get the hang of this!
12. We can also figure out the sides of the large triangle as well. 12 is twice as big as 6. So the sides of this triangle are twice as large.
13. As usual, Mr. Harvey is going to show us how this relates to the real world. HERE WE GO!
14. OK class, you will need a meter stick, pen and pencil. Remember it needs to be sunny, and don’t do this around noon!
15. I hope you brought all our materials outside for this!
16. Hold your meter stick perpendicular to the ground so it makes a shadow just like the flag pole. I wonder how this will work.
20. I measured the meter stick shadow as 50 cm. That is half a meter! Good! Now measure the shadow of the flag pole.
21. The other shadow is 2 meters. The flag pole triangle is four times the size of the meter stick triangle. So what is the height of the flag pole?
22. Good Job! The meter stick is 1 meter. The flag pole is 4 times larger. The flag pole is 4 meters high. Thanks Mr. Harvey and thanks to all you who came along! I hope you learned something today!
