Grade by Grade
E. Spatial Sense · Shapes, Maps and Measurement

Shapes, Maps and Measurement: Unit Review

E1.1 E1.2 E1.3 E1.4 E1.5 E2.1 E2.2 E2.3 E2.4 A1About 40 minutes
Learning goals
  • I can sort and describe shapes by their sides, angles and lines of symmetry.
  • I can compose, decompose and compare shapes, and use maps and directions.
  • I can measure length in units, centimetres and metres, and describe how long events take.

Words to know

polygon
A closed flat shape with only straight sides.
line of symmetry
A fold line that makes two matching halves.
congruent
Same size and same shape.
legend
The part of a map that tells what the symbols mean.
centimetre and metre
Standard units of length. 100 cm = 1 m.
duration
How long something lasts.

Let's review!

You have learned a lot about shapes, maps and measurement in this unit. This review has a few questions from every lesson. Try each one, then press Show answer to check. Have a ruler, a sheet of paper and some paper or toy shapes nearby. If a part feels tricky, go back to that lesson for more practice.

vertexsidesquare cornerline of symmetryPentagon:5 sides5 vertices2 square corners1 line of symmetry
A house-shaped pentagon. Count its sides and vertices, find its square corners, and spot its line of symmetry.

Polygons: Counting Sides and Vertices

1

How many sides does a hexagon have?

2

A shape has 4 straight sides, and none of them are the same length. Is it a quadrilateral?

3

Is an oval a polygon? Why or why not?

Angles and Square Corners

1

What tool from home can you use to check for a square corner?

2

The tip of a slice of pizza: is the angle smaller or bigger than a square corner?

3

Name a shape with 4 sides and 4 square corners.

Lines of Symmetry

1

How many lines of symmetry does a square have?

2

Does the capital letter E have a line of symmetry? Where?

3

Is a diagonal fold a line of symmetry for a long rectangle?

Putting Shapes Together and Taking Them Apart

1

How many pattern-block triangles make a hexagon?

2

A shape covers 9 squares. You cut it into 3 pieces and make a new shape. How many squares does it cover?

3

What does decompose mean?

Congruent Shapes: Same Size, Same Shape

1

Two triangles are the same size and shape, but one is upside down. Are they congruent?

2

Are a toonie and a quarter congruent?

3

A square and a rhombus both have all sides 4 cm. Are they congruent? Why?

Describing Positions and Movements

1

How many quarter turns make a half turn?

2

On a grid, a robot goes right 4, then up 2. What moves bring it back?

3

You face the door and make a half turn. Which way are you facing now?

Making and Reading Simple Maps

1

What is a bird's-eye view?

2

What part of a map tells you what the symbols mean?

3

On a map, the library is 3 blocks right of the school, and the park is 2 blocks right of the library. How many blocks is it from the school to the park?

Measuring with Units: Big Units and Small Units

1

A table is 6 spoons long. Will it be more or fewer than 6 if you measure with paper clips (shorter than spoons)?

2

Which is a better unit for the length of a hallway: paper clips or footsteps?

3

Why can't you leave gaps between units?

Length1 metre02040608010010 pieces of 10 cm1 m = 100 cmTime12369minute hand all the way around:60 minutes = 1 hourand 60 seconds = 1 minute
1 metre = 100 centimetres. When the minute hand goes all the way around the clock, 60 minutes = 1 hour has passed.

Centimetres and Metres

1

1 m = ___ cm

2

Would you measure a mitten in centimetres or metres?

3

Which is longer: 1 m or 75 cm?

Measuring and Drawing with a Ruler

1

A crayon starts at 0 and ends at 9 on a ruler. How long is it?

2

A button starts at 4 and ends at 7. How long is it?

3

Draw a line 6 cm long. Where do you put your dots?

How Long Does It Take? Seconds, Minutes and Hours

1

Would you use seconds, minutes or hours for how long a school day lasts?

2

How many seconds are in 1 minute?

3

Music class starts at 1 o'clock and ends at half past 1. How long is it?

4

A trip to Grandma's starts at 9 o'clock and ends at 12 o'clock. How long is it?

Just for fun

Why is it no use arguing with a circle?

Because there's no point! (A circle has no vertices at all.)

How to use this review

  • Do the review over two short sittings if your child gets tired. Each section matches one lesson.
  • Keep real tools nearby: paper shapes to fold, a ruler, a sheet of paper for a corner checker, and a clock.
  • After each answer, ask "How do you know?" Explaining is part of Grade 2 math.
  • Note which section had mistakes, then revisit that lesson's activity and practice.
Check your understanding

Quiz

1.

A shape has 5 straight sides. What is it called?

2.

Which angle is bigger than a square corner?

3.

How many lines of symmetry does a rectangle (not a square) have?

4.

How many pattern-block trapezoids make a hexagon?

5.

Which pair of shapes is congruent?

6.

Your friend faces you and raises their right hand. Which of your hands is straight across from it?

7.

A map shows things from...

8.

A rug is 8 big steps long. If you measure it with small steps, you will get...

9.

A ribbon starts at 3 and ends at 10 on a ruler. How long is it?

10.

Which takes about 1 hour?

For parents and teachers

What this review covers: every lesson in this unit (Ontario Mathematics, Grade 2, 2020: E1.1, E1.2, E1.3, E1.4, E1.5, E2.1, E2.2, E2.3, E2.4, with social-emotional learning skills from strand A woven in).

Which lesson to revisit:

  • Names shapes by how they look instead of counting sides, or says a circle is a polygon: revisit Polygons: Counting Sides and Vertices.
  • Thinks longer sides make a bigger angle, or can't check a square corner: revisit Angles and Square Corners.
  • Thinks a rectangle's diagonal is a line of symmetry, or copies instead of flipping when completing a picture: revisit Lines of Symmetry.
  • Thinks a rearranged shape has more or less area, or is unsure how many triangles make a hexagon: revisit Putting Shapes Together and Taking Them Apart.
  • Says a turned shape is not congruent, or checks only the sides: revisit Congruent Shapes: Same Size, Same Shape.
  • Counts the starting square, mixes up quarter and half turns, or can't reverse a route: revisit Describing Positions and Movements.
  • Draws objects from the side on a map, or forgets the legend: revisit Making and Reading Simple Maps.
  • Thinks a bigger number always means longer, even with different units, or leaves gaps when measuring: revisit Measuring with Units: Big Units and Small Units.
  • Mixes up centimetres and metres ("my pencil is 15 m"): revisit Centimetres and Metres.
  • Reads the last number on the ruler when the object doesn't start at 0, or counts marks instead of spaces: revisit Measuring and Drawing with a Ruler.
  • Chooses unreasonable time units, mixes up the clock hands, or miscounts hours: revisit How Long Does It Take? Seconds, Minutes and Hours.

Tip: one or two mistakes in a section are fine. If a whole section is hard, spend a few days on that lesson's activity before trying the review again.