Book 1A Ch 11 PLANE FIGURES § 11-3 and § 11-4

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 1

Ch 1 Plane figures

A good look back at § 11-3 first:

+ Exercises 19 and 20

+ For this we first go through the 'Theory' on page 138!

Time for § 11-4 !!

Ask your teacher to demonstrate :

The sum of the angles of a triangle!

Conclusion:

The sum of the 3 angles of a triangles is

.......................... ?

Now use the coming 7 minutes for:

+  doing exercise 23 

+  studying the 'Method' on page 140 and 

+  doing exercise 24

Time for a short movie:

Let's watch :

'§ 11-4 Hoeken berekenen in een vierhoek'

(It is the Dutch version of the 'Method' on page 141 !)

In the remaining time:

Finish § 11-4, 

as far as you can.

Finally:

Working hard will help you too

- understand a lot about Plane Figures, and

- have little homework