# Parallellogram & corresponding/alternate angles (t1b)

More angles & parallellograms

March 29th, 2021
t1b
12:25
Cameras ON
1 / 30
Slide 1: Slide
WiskundeMiddelbare schoolvwoLeerjaar 1

This lesson contains 30 slides, with interactive quizzes and text slides.

Lesson duration is: 60 min

## Items in this lesson

More angles & parallellograms

March 29th, 2021
t1b
12:25
Cameras ON

#### Slide 1 -Slide

Schedule
• Programme                                                                     5 min
• Test ch.5-6 answers                                                  15 min
• Review: homework  (choice)                                 10 min
• Parallellograms
Corresponding/alternate angles
15 min
• Practice exercise                                                       15 min

Discuss exercise

Test ch.5-6

#### Slide 3 -Slide

Choice
• Take a look at the homework in your notebook
• Think about which exercise you would like to see answered correctly
• Make a choice when the poll comes up

Options:
23, 26, 32, 33 or 34

Programme

#### Slide 5 -Slide

Which exercise would you like to see?
23
26
32
33
34

#### Slide 11 -Slide

I still don't really understand it
I understand the explanation, but I'm not sure I can do this kind of exercise on my own
I understand and I think I can do this kind of exercise on my own

#### Slide 12 -Poll

Today's
Intended Learning Outcomes

At the end of the lesson you can...
• Use the properties of parallellograms to do calculations with angles
• Recognize corresponding and alternate angles and use them to calculate angles

#### Slide 13 -Slide

How would you describe a parallellogram?

Parallellograms

Parallellograms

#### Slide 16 -Slide

In parallellogram
PQRS,

Calculate
P1=100°.
R4.
A
R2=80°
B
R2=100°
C
R2=260°
D
R2=280°

#### Slide 18 -Slide

Alternate angles (Z-shape)
If you have two parallel lines, and a line between them,
"The elbow crooks in a Z-shape are the same"

#### Slide 19 -Slide

Alternate angles (Z-shape)
If you have two parallel lines, and a line between them,
"The elbow crooks in a Z-shape are the same"

#### Slide 20 -Slide

Alternate angles (Z-shape)
If you have two parallel lines, and a line between them,
"The elbow crooks in a Z-shape are the same"

#### Slide 21 -Slide

Find out which other angle
is also 76 degrees like
Use alternate angles (Z-shape).
A1.
A
D1
B
D4
C
C1
D
C2

#### Slide 22 -Quiz

Find out which other angle
is also 63 degrees like
Use alternate angles (Z-shape).
B1.
A
D1
B
D4
C
C1
D
C2

#### Slide 23 -Quiz

Corresponding angles (F-shape)
If you have two parallel lines, and a line between them,
"The elbow crooks in an F-shape are also the same"

#### Slide 24 -Slide

Corresponding angles (F-shape)
If you have two parallel lines, and a line between them,
"The elbow crooks in an F-shape are also the same"

#### Slide 25 -Slide

Find out which angle is the
same size as
Use corresponding angles
(F-shape).
A4.
A
D1
B
D4
C
C1
D
C2

#### Slide 26 -Quiz

Find out which angle is the
same size as
Use corresponding angles
(F-shape).
B2.
A
D1
B
D4
C
C1
D
C2

#### Slide 27 -Quiz

Practice
Chapter 7:
Do 39 and 41 (parallellograms)
Do 53 and 54 (alternate angles)
Do 56 and 58 (corresponding angles)
Do 59 and 61 (mix)
Do 63 ór 65 (choice)
How to write down your calculations neatly
• Don't just start writing; look at the steps you want to take
• Find out where you should start: use the given information
• Write down calculations AND the rule you used each time (in brackets behind it)
• Go on until you reach the angle that was requested

#### Slide 28 -Slide

What did you think of this lesson?
There was too much explaining and not enough practice
The mix between explaining and practice was fine
I have another opinion that I would like to share