Vertically opposite angles + angle pairs

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 2

Good morning!

Schedule: 

• Learning goals 
• Revision questions 
• Starter
• Angle pairs
• Work

Learning goals 

At the end of this lesson I can:

•  Identify the different types of angle pairs
• Find equal vertically opposite angles

A

B

C

D

E

F

G

If two angles are complementary and one of them is 77°, what is the size of the other angle?

Starter

1. Find the values for x, y and z

2.

a) Identify a pair of corresponding angles

b) Identify a pair of alternate angles

c) Identify a pair of Co-interior/allied angles

Starter

1. Find the values for x, y and z

x = 90°          y = 50°        z = 40°

2.

a) Identify a pair of corresponding angles

A and E        B and F        C and G         D and H

b) Identify a pair of alternate angles

C and F         D and E

c) Identify a pair of Co-interior/allied angles

C and E         D and F

Angle Pairs

Angles in an F-shape are

Corresponding angles

Angles in an U-shape are

Co-interior angles

Angles in an N-shape are

Alternate angles

Angle Pairs

Angles in an F-shape are

Corresponding angles

Angle Pairs

Angles in an U-shape are

Co-interior angles

Or same-side interior

You also have Co-exterior

Or same-side exterior

Angle Pairs

Angles in an N-shape are

Alternate angles

You have alternate interior angles 

and 

Alternate exterior angles

What to do

- I really want a challenge                                                  Do the Pink work on LessonUP

- I understand it, but I think a                                           Do the Blue work on LessonUp

 bit more practice will help me                 

- I think more practice will help me,                             Work with the board

and would like to do more board work                                                               

Angle Pairs

Vertically opposite angles are formed when two lines intersect (forming an X-shape). 

Vertically opposite angles are ALWAYS equal to each other

Angle Pairs

Vertically opposite angles are formed when two lines intersect (forming an X-shape). 

Vertically opposite angles are ALWAYS equal to each other

Angle pairs 

Let's get to work! 

p. 54: 3E                 1, 2

P. 56: 3F                  2, 4, 6

p. 54: 3E                 2, 3

p. 57: 3F                  2, 4, 6, 7, 8

p. 54: 3E                 2, 3

p. 57: 3F                 2, 4, 6, 7, 8 

                  ManageBac > Files > Unit4 >  Find the angles Challenge

Matching race 

How fast can you match the vocabulary with correct pictures? 
https://www.educaplay.com/learning-resources/4083295-angle_pairs.html

Name angles 

Write your name with straight lines only 

Identify (with the correct symbols): 

- parallel lines

- perpendicular lines 

- corresponding angles 

- alternate angles 

- co-interior angles 

- co-exterior angles 

Dance, Dance, Angles

You need 4 people in a group: 

- A performer

- A timer

- A counter 

- A reader 

Tape 3 lines on the floor in a way that it resembles an H shape

The reader will read an angle pair from a list which the performer will have to show by stepping on angles in the tape. (within 30 sec) 

When the 30 sec are up, the reader will read the next angle pair. 

The counter will count how many angle pair the performer gets right. 

Homework

BRING A COMPASS AND A RULER