Grade 2 | MATHEMATICS
WEEK 13 • STUDENT TEXTBOOK • DAYS 61–65
Read each lesson with a parent or teacher and study the worked example. Then answer the questions for that day in the Week 13 Practice Workbook.
Week 13 Student Textbook | Week 13 Practice Workbook | Week 13 Teacher Guide | Week 12 Student Textbook | Week 14 Student Textbook | Grade 2 index
Day 61: Polygons: Count Sides and Corners
A polygon is a closed, flat shape with straight sides. Where two sides meet is a corner. Count the sides or the corners to name a polygon.
A triangle has 3 sides. A quadrilateral has 4 sides. A pentagon has 5 sides. A hexagon has 6 sides. A polygon always has the same number of corners as sides.
Worked example: A shape has 4 sides and 4 corners. What kind of shape is it?
- Count the sides: 4.
- A shape with 4 sides is a quadrilateral.
Worked answer: A quadrilateral.
Day 62: Quadrilaterals and Square Corners
Some quadrilaterals have special names. A rectangle has 4 square corners. A square has 4 square corners and 4 sides of the same length. A square corner looks like the corner of a sheet of paper.
Other quadrilaterals have no square corners, or only some. They are still quadrilaterals because they have 4 sides. A square is a special kind of rectangle, because it has 4 square corners too.
Worked example: Is a triangle a quadrilateral?
- A quadrilateral has 4 sides.
- A triangle has 3 sides.
Worked answer: No, because it has only 3 sides.
Day 63: Draw Shapes
You can draw shapes by connecting dots with a ruler. Each line you draw is one side. Each place two lines meet is a corner.
Read the rules for the shape before you draw: how many sides, and whether it needs square corners or equal sides. Then count your sides and corners to check.
Worked example: Draw a rectangle that is 4 dots long and 2 dots tall. How many square corners does it have?
- Draw a line across 4 dots, then down 2 dots, then back across, then up.
- Check each corner with a square-corner checker.
Worked answer: It has 4 square corners.
Day 64: Cubes
A cube is a solid shape, not a flat one. It has faces, edges and corners. A face is a flat side. An edge is where two faces meet. A corner is where edges meet.
Every face of a cube is a square, and all the faces are the same size. A cube has 12 edges. A number cube used in games is shaped like a cube.
Worked example: How many edges does a cube have?
- Count the 4 edges around the top, the 4 around the bottom, and the 4 that go up and down.
- 4 + 4 + 4 = 12.
Worked answer: 12 edges.
Day 65: Independent Check: Shapes
Today you will answer on your own.
Use what you learned this week: count sides and corners, name polygons, find square corners, draw shapes and describe cubes.
Worked example: Name a shape with 5 sides.
- Count: 5 sides.
- A 5-sided shape is a pentagon.
Worked answer: A pentagon.
Week 13 Student Textbook | Week 13 Practice Workbook | Week 13 Teacher Guide | Week 12 Student Textbook | Week 14 Student Textbook | Grade 2 index