Angle properties

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 2

Good morning!

Schedule: 

• Learning goals
• Starter
• Angle properties
• Work 

Learning goals 

At the end of this lesson I can:

•  Identify supplementary angles
• Identify complementary angles 
• Use complementary and supplementary angles to find the value of unkown angles

Verbindt de hoeken  met het juiste begrip

Acute angle

Right angle

Reflex angle

Obtuse angle

Straight angle

Angle A

Angle L

Angle H

Angle F

Angle E

Starter

1. Are angles with sizes 37° and 53° complementary? 

2. What angle size is supplementary to 48°? 

3. Find the unknown value (y) 

Starter

1. Are angles with sizes 37° and 53° complementary? Why? 

Yes because they add up to 90°

2. What angle size is supplementary to 48°? 

The angle supplementary to 48° is 180° - 48° = 132° 

3. Find the unknown value (y) 

110° + 90° + y = 360°

y = 360° - 110° - 90°

y = 160°

Supplementary and complementary angles

Angles which add to 180° are Supplementary angles: 

Angles which add to 90° are Complementary angles: 

Supplementary and complementary angles

Angles which add to 180° are Supplementary angles: 

Angles which add to 90° are Complementary angles: 

Supplementary starts with the S of 'Straight angle'

Complementary starts with the C of 'Corner'

Supplementary and complementary angles

Angles which add to 180° are Supplementary angles: 

Homework

p. 52: 3D                1abc, 2, 3, 6abc

             

p. 53: 3D                4, 5, 6, 7

        

p. 53: 3D                4, 5, 6, 7

                                    ManageBac > Files > Unit 4 > Complementary                                        Supplementary word problems