Classifying triangles
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Lesson details
Key learning points
- In this lesson, we learn how to describe the properties of scalene, isosceles and equilateral triangles. We will also learn how to identify and classify triangles inscribed in circles.
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6 Questions
Q1.
Decide if the statements are always true, sometimes or never true: All quadrilaterals have 4 lines of symmetry.
Always true
Never true
Q2.
Decide if the statements are always true, sometimes or never true: The number of lines of symmetry a polygon has is more than its number of sides.
Always true
Sometimes true
Q3.
Decide if the statements are always true, sometimes or never true: A regular polygon has as many lines of symmetry as it does sides.
Never true
Sometimes true
Q4.
Decide if the statements are always true, sometimes or never true: The number of lines of symmetry a polygon has is the same as its order of rotational symmetry.
Always true
Never true
Q5.
How many lines of symmetry does a parallelogram have?
1
2
4
Q6.
How many lines of symmetry does the shape below have?
1
2
6 Questions
Q1.
What is a triangle with at least two equal sides called?
Equilateral triangle
Obtuse triangle
Scalene triangle
Q2.
What is a triangle with three equal sides called?
Isosceles triangle
None
Scalene triangle
Q3.
Would it be possible to draw a scalene triangle with more than one obtuse angle?
Yes, this will be possible
Q4.
The sum of all the angles of a triangle is:
100 degrees
360 degrees
90 degrees
Q5.
Zaki and Connor are looking at the diagram on the right. Who do you agree with? Why?
Connor
Neither of them
Q6.
I am thinking of a triangle which have the following properties: no lines of symmetry and has one right angle. Which triangle am I thinking of?
Equilateral triangle
Isosceles triangle