Identifying lines of symmetry in 2D shapes
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Lesson details
Key learning points
- In this lesson, we will explore the meaning of lines of symmetry and addresses common misconceptions.
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This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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5 Questions
Q1.
What is the name given to a triangle with 3 equal sides?
Right angled triangle
Scalene triangle
Trapezium
Q2.
What is the name given to a triangle which has the following three angles: 80°, 40° and 60° ?
Equilateral triangle
Isosceles triangle
Right angled triangle
Q3.
If a triangle has the angles of 90° and 60°, what is the third angle?
180°
40°
90°
Q4.
Which of these are NOT interior angles of a triangle?
40°, 55°, 75°
60°, 60° and 60°
70° , 70° and 40°
80°, 20°, 70°
Q5.
A right angled triangle can also be ...
a scalene or an equilateral triangle
an equilateral triangle
an isosceles or an equilateral triangle
5 Questions
Q1.
Which statement best describes a line of symmetry?
A curved line
A long line
A straight line that passes through the centre of the shape so that one part is different to the other part
Q2.
How many lines of symmetry does a square have?
0
1
2
Q3.
Which of the following statements is correct?
All regular shapes have exactly 2 lines of symmetry
Only 3d shapes have lines of symmetry
Only regular shapes have lines of symmetry
Q4.
Which of the following statements is incorrect?
An equilateral triangle has 3 lines of symmetry
An isosceles triangle has 2 lines of symmetry
Irregular shapes can have lines of symmetry
Q5.
Which os the statements about triangles is correct?
A scalene triangle has 2 lines of symmetry
An equilateral triangle has exactly 2 lines of symmetry
An isosceles triangle has 0 lines of symmetry