Special Triangles (year 1)

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Slide 1: Slide
WiskundeMiddelbare schoolvwoLeerjaar 1

This lesson contains 13 slides, with interactive quizzes, text slides and 1 video.

time-iconLesson duration is: 50 min

Items in this lesson

Slide 1 - Slide

8

Slide 2 - Video

00:59
Which types of angles do you know? Write down as many as you know.

Slide 3 - Open question

02:45
How many axes of symmetry does an equilateral triangle have?
A
0 axes of symmetry
B
1 axis of symmetry
C
2 axes of symmetry
D
3 axes of symmetry

Slide 4 - Quiz

03:13
How may axes of symmetry does an isosceles triangle have?
A
0 axes of symmetry
B
1 axis of symmetry
C
2 axes of symmetry
D
3 axes of symmetry

Slide 5 - Quiz

04:20
Copy the table from the screen into your notebook. 
Give this table a title: Types of triangles.

Slide 6 - Slide

04:24
Draw examples of an scalene acute triangle and an scalene obtuse triangle 
into the table in your notebook. 
Remember: in a scalene triangle the lengths of all the edges in the triangle are different.

Slide 7 - Slide

04:38
Draw examples of an isoscles right-angled triangle into the table in your notebook.

Slide 8 - Slide

04:52
Why is an equilateral triangle always an acute triangle?

Slide 9 - Open question

05:08
Complete your table about 
Types of triangles

Slide 10 - Slide

Slide 11 - Slide

Slide 12 - Slide

Agenda
What we're doing today:

  • Special triangles
  • Isosceles triangles
  • equilateral traingles
  • right-angled triangles


Theory 9.3A

Slide 13 - Slide