JavaScript isn't enabled in your browser, so this file can't be opened. Enable and reload.

1 of 16

Thinking About Interior and Exterior Angles (Part 1)

www.ponderingplanning.wordpress.com

@DrRowlandson

Using Logo Programming to Explore Exterior Angles

2 of 16

Not an exterior angle.

Is an exterior angle.

3 of 16

Here is some code that draws a shape…

What shape do you think it will draw?

4 of 16

This code draws a square.

5 of 16

Loops could also be used too...

6 of 16

What code could we use to draw an equilateral triangle?

What angle should we ask the arrow to turn?

100

7 of 16

Why has the arrow done that? Why didn’t this code draw an equilateral triangle?

Using an angle of 60^o

8 of 16

Why has the arrow done that? Why didn’t this code draw an equilateral triangle?

Using an angle of 300^o

9 of 16

Why has the arrow done that? Why did this code draw an equilateral triangle?

Using an angle of 120^o

10 of 16

What angles should I use in the code to draw this triangle?

150

200

250

37^o

53^o

11 of 16

What are the exterior angles for each quadrilateral?

85^o

74^o

143^o

58^o

85^o

74^o

143^o

58^o

12 of 16

What are the three interior angles for this triangle?

120

13 of 16

Calculate the size of the interior angles for this triangle.

108^o

144^o

What is the size of the third exterior angle?

14 of 16

What code could I use to draw a regular pentagon?

What angle should I ask the arrow to turn?

15 of 16

Regular pentagons have exterior angles of 72^o.

16 of 16

Thinking About Interior and Exterior Angles (Part 1)

www.ponderingplanning.wordpress.com

@DrRowlandson

Using Logo Programming to Explore Exterior Angles