This lesson contains 10 slides, with interactive quizzes and text slides.
Lesson duration is: 50 min
Items in this lesson
Recap: Area triangle
Calculate the area of triangle ABC.
Write down your calculation and
take a picture/screenshot
Slide 1 - Slide
Calculate the area of triangle ABC
Slide 2 - Open question
Recap: Area triangle
Slide 3 - Slide
Which exercises should we discuss on the board?
Slide 4 - Mind map
Parallelograms
A parallelogram is a quadrilateral (figure with four sides) where the opposite sides have the same length and are parallel and the opposite angles are equal.
Slide 5 - Slide
Area parallelogram
A triangle can be cut off a parallelogram and then moved to the other side, to turn the parallelogram into a rectangle.
Slide 6 - Slide
Area parallelogram
Or shorter:
Slide 7 - Slide
Base and height
The base of a parallelogram is, like with a triangle, one side of the figure. The corresponding height is perpendicular to the base to the opposite side. The height can be outside the parallelogram.
Slide 8 - Slide
Base and height
The base of a parallelogram is, like with a triangle, one side of the figure. The corresponding height is perpendicular to the base to the opposite side. The height can be outside the parallelogram.
Lesson duration is: 50 min
