Use knowledge of shape properties to draw shapes accurately using rulers and protractors | Maths

Starter quiz

Select all of the statements that are true of polygons.
- They are two-dimensional shapes. ✓
- In special circumstances, they can be 3D shapes.
- They have all curved sides.
- They have all closed sides. ✓
- The interior angles can sometimes be right angles. ✓
What is this?
- Ruler
- Protractor ✓
- Number line
Match the letter to the correct protractor part.
- A
  
  ⇔
  
  outer scale ✓
- B
  
  ⇔
  
  inner scale ✓
- C
  
  ⇔
  
  centre ✓
- D
  
  ⇔
  
  base line ✓
Match the number of sides to the shape name.
- 3 sides
  
  ⇔
  
  scalene triangle ✓
- 4 sides
  
  ⇔
  
  rhombus ✓
- 5 sides
  
  ⇔
  
  pentagon ✓
- 6 sides
  
  ⇔
  
  hexagon ✓
- 7 sides
  
  ⇔
  
  heptagon ✓
Match the quadrilateral to the correct name.
- A
  
  ⇔
  
  kite ✓
- B
  
  ⇔
  
  trapezium ✓
- C
  
  ⇔
  
  rhombus ✓
- D
  
  ⇔
  
  square ✓
Match the triangle to the correct name.
- A
  
  ⇔
  
  isosceles ✓
- B
  
  ⇔
  
  equilateral ✓
- C
  
  ⇔
  
  right-angled scalene ✓

Exit quiz

Which of these triangles is possible?
- All angles exactly the same as each other. ✓
- All interior angles of 70°.
- Three right angles.
- Two right angles.
- One right angle and two acute angles. ✓
Which of these descriptions could be describing the interior angles of a triangle?
- Three obtuse angles.
- No obtuse angles. ✓
- No acute angles
- Three acute angles. ✓
- One obtuse angle and two acute angles. ✓
Alex is plotting a triangle. Which angle has he started to mark out?
- 85°
- 105°
- 75° ✓
- 115°
Which of these descriptions could be describing the interior angles of a quadrilateral?
- Three obtuse angles and one other. ✓
- No obtuse angles. ✓
- Four acute angles.
- No acute angles. ✓
The acute angle in this image is ______°.
- '30' ✓
What is the size of angle a? ______ °
- '130' ✓

Worksheet

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Lesson Details

Key learning points

A protractor is used to draw and measure angles accurately.
Read the scale from zero on a protractor to draw and measure angles accurately.
Read the scale from zero on a ruler to draw and measure accurately.

Common misconception

Pupils can find protractors tricky, sometimes drawing the wrong angle because the outer scale has been used rather than the inner-scale, or vice-versa.

Emphasise estimation through knowledge of angle types. Model discussion of whether an angle is acute or obtuse and use this knowledge to identify which value on which scale is the measurement.

Keywords

Protractor - A protractor is an instrument used in measuring or drawing angles.