# 7-2 Tangent

7-2 Tangent

What you need:
- Textbook, writingbook, iPad
- Pen, pencil, geotriangle
- Calculator

Schoolbags in the cuboard
Phones in the phonebag
Bluetooth
- ON
- VPN off
1 / 30
Slide 1: Slide
WiskundeMiddelbare schoolhavoLeerjaar 3

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

Lesson duration is: 50 min

## Items in this lesson

7-2 Tangent

What you need:
- Textbook, writingbook, iPad
- Pen, pencil, geotriangle
- Calculator

Schoolbags in the cuboard
Phones in the phonebag
Bluetooth
- ON
- VPN off

#### Slide 1 -Slide

Lesson goal
At the the end of this lesson, you must be able to calculate the angle of elevation if the ratio of

is known.
distanceheight

#### Slide 2 -Slide

A drawing acocording to scale
timer
8:00

#### Slide 4 -Slide

The tangent...
The result

can also be called the tangent instead of the gradient.

You cn write this as
distanceheight
tan(A)

#### Slide 5 -Slide

Make question 7, and type answers into lessonup...
timer
2:00

tan
A
A
6/13
B
13/6
C
12/13
D
13/12

tan
B
A
6/13
B
13/6
C
5/6
D
6/5

tan
C
A
12/13
B
13/12
C
5/12
D
12/5

#### Slide 10 -Slide

Hoek berekenen...
Als       tan

dan is                = tan-1

dus dan is             =
A=43
A
43
A
B
C
4
3
A
370

timer
3:00

#### Slide 13 -Slide

So, how do you calculate the angle...

#### Slide 14 -Slide

Try 11, and type your answers into lessonup...
timer
5:00

1 - tangent
A
0,125
B
8
C
1800

#### Slide 16 -Quiz

1 - angle of elevation
A
7
B
8
C
9
D
10

2 - tangent
A
0,2
B
5
C
28125
D
79

3 - Height
A
40
B
640
C
156
D
14

3 - angle
A
14
B
15
C
16
D
17

4 - height
A
61
B
62
C
63
D
64

4 - tangent
A
0,1235...
B
0,3057...
C
0,8294...
D
0,9132...

#### Slide 22 -Quiz

The greater the tangent, the ... the angle of elevation
A
greater
B
smaller
C
same size
D
none of the above

#### Slide 25 -Slide

Try on your own
1, 2, 5 and 7
TRY ON YOUR OWN...

RULES:
• In your writingbook
• Use: Textbook
• Discussion when you are stuck is allowed

timer
12:00
Extra excercise: none
Challenge: none
8, 9
(p. 12)