SAUDI VISION 2030 - DIGITAL EDUCATION INITIATIVE
Cambridge Primary Mathematics Grade 3
Topic: Line Symmetry & Reflective Patterns (Exercise 17.1)
Expert Explanation: What is Symmetry?
In the world of K-12 Digital Transformation, understanding spatial geometry is a core competency. Symmetry occurs when a shape is identical on both sides of a central line, known as the Axis of Symmetry. This concept is widely used in STEM Education UK, architecture, and even in the design of the Grand Mosque (Makkah).
- Line of Symmetry: An imaginary line that divides a figure into two mirror-image halves.
- Reflection: When a shape is flipped over a mirror line (Learner's Book Pg 262).
- Symmetrical Patterns: Used in flags, nature, and engineering.
Section 1: Identify Symmetrical Shapes
Look at the shapes below. Write YES if it is symmetrical and NO if it is not.
1. A Square tile:
2. A Scalene Triangle:
3. An Oval:
4. The Letter 'A':
5. The Letter 'L':
6. A Regular Pentagon:
7. A Leaf pattern:
8. A Rectangle:
9. A Star shape:
10. A Rhombus:
Section 2: Count the Lines of Symmetry
How many lines of symmetry do these Grade 3 Math Geometry shapes have?
11. A standard Rectangle:
12. A Square:
13. An Equilateral Triangle:
14. A Circle:
15. The Saudi National Flag:
16. An Isosceles Triangle:
17. A Regular Hexagon:
18. A Heart shape:
19. A Butterfly:
20. A Cross (+):
Section 3: Reflection & Grid Patterns (Workbook Pg 237-243)
Complete the description or solve the reflection logic.
21. If you reflect a 'Left-pointing arrow' across a vertical line, it points:
22. Marcus folds a paper twice (horizontal then vertical). How many quadrants are created?
23. To draw a symmetrical face, the left eye must be a ___ of the right eye.
24. A mirror line is always ___ to the distance between the object and image.
25-30. [Practice Space: Draw a reflection of your name in the space below when printed]
DRAWING AREA
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