class: middle center text-light bg-info # Teaching Plan of Periscpe ## CyrusN --- # Background - 55 mins - Target: F3 - No of students: 26 --- # Objective - 鏡像反射定律 - 加強學生利用平面圖展示立體圖形 + 例如可用開展讓學生更能了解 - 了解直角等腰三角形的**.text-danger[斜邊與高]**的比例 $\sqrt{2}:1$ + 有助學生了解三角的特別角 - 增潤知識 + A 系紙的長闊比為 $\sqrt{2}:1$ --- # 白銀比例的應用 $\sqrt{2}:1$ - [A4 紙的長闊比](https://www.wikiwand.com/en/Silver_ratio#/Paper_sizes_and_silver_rectangles) - [白銀比例 - Wikipedia](https://en.wikipedia.org/wiki/Silver_ratio) --- # A4 紙的長闊比 - 長:297mm - 濶:210mm - Ratio: + $\displaystyle \frac{297}{210}=1.41 (3 sig. fig.)$ --- # Making of .img-50.center[ ![makingof](https://docs.google.com/drawings/d/e/2PACX-1vRgRDsAHOplXRh8Ez_HPAuqdgH2Bn2I2tRX-s8YBUw87LToE40bho3EQOF1UOu4VoaZgd2lwkMFCvRR/pub?w=960&h=720) ]