Identify different types of triangle
I can identify different types of triangles and describe their properties.
Identify different types of triangle
I can identify different types of triangles and describe their properties.
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Lesson details
Key learning points
- All triangles have 3 straight sides and 3 vertices.
- Equilateral triangles have 3 equal sides and 3 equal angles.
- Isosceles triangles have 2 equal sides and 2 equal angles.
- Scalene triangles have no equal sides and no equal angles.
Keywords
Equilateral triangle - Equilateral triangles have 3 equal sides and 3 equal angles.
Isosceles triangle - Isosceles triangles have 2 equal sides and 2 equal angles.
Scalene triangle - Scalene triangles have no equal sides and no equal angles.
Common misconception
Some children may find it harder to recognise the type of triangle when they are drawn in different positions and orientations.
Allow time for children to manipulate the triangles so that they can see them in different orientations and build their understanding of the properties of each type of triangle.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.The corners of a shape are called the
Q2.Which of the statements are true for all polygons?
Q3.Match the polygon with the number of sides that it has.
3
4
5
6
8
Q4. A right angle is the same as a __________ turn.
Q5.Match the names of the polygons with their properties
a quadrilateral.
a pentagon.
a hexagon.
an octagon.
Q6.Which of these shapes are quadrilaterals?
Assessment exit quiz
6 Questions
Q1.Which of these statements are true for all triangles?
Q2.All triangles have 3 straight sides and 3 vertices. Which of the following are triangles?
Q3.Match the triangles to the correct description.
This triangle has no equal sides and no equal angles.
This triangle has three equal sides and three equal angles.
This triangle has two equal sides and two equal angles.
Q4.An equilateral triangle has 3 sides and 3 angles that are __________.
Q5.Which triangle has no equal sides or angles?
Q6.Match the type of triangle to its properties.
no equal sides and no equal angles
two equal sides and two equal angles
three equal sides and three equal angles