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P1 maths・1S2

2-D shapes

Telling straight lines from curves, and points from lines; triangles, quadrilaterals, pentagons, hexagons and circles, and counting their sides; seeing that a shape turned round is still the same shape; and making new shapes from smaller ones.

Key words

ChineseEnglish
直線straight line
曲線curve
三角形triangle
四邊形quadrilateral
五邊形pentagon
六邊形hexagon
圓形circle
邊side

The 10 short lessons and the chapter test

Lessons are in Chinese for now.

  1. 直線和曲線
  2. 點和線
  3. 數直線和曲線
  4. 數邊
  5. 三角形和四邊形
  6. 五邊形、六邊形和圓形
  7. 轉了方向的圖形
  8. 找一找
  9. 拼砌圖形
  10. 重溫
  11. 章節測驗 (chapter test)

Sample questions (in Chinese)

Question 1下面哪一條是直線?

Answer and explanation

答案:C

為甚麼?直線是直直的,沒有彎曲;曲線是彎的。

Question 2這句話對還是錯?
曲線是彎的。

  1. 對
  2. 錯
Answer and explanation

答案:A.對

為甚麼?曲線是彎的;直線是直的。

Question 3這是甚麼圖形?

  1. 三角形
  2. 四邊形
  3. 六邊形
  4. 五邊形
Answer and explanation

答案:A.三角形

為甚麼?數一數,它有 3 條直的邊,所以是三角形。轉了方向也一樣。

Question 4下面哪一個是三角形?

Answer and explanation

答案:C

為甚麼?三角形有 3 條直的邊。

Based on learning unit 1S2 of the Education Bureau’s Primary Mathematics Curriculum (2017).

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