# Tangent (t3g)

Tangent

April 15th
t3d
12:05
1 / 24
Slide 1: Tekstslide
WiskundeMiddelbare schoolvwoLeerjaar 3

In deze les zitten 24 slides, met interactieve quizzen en tekstslides.

Lesduur is: 60 min

## Onderdelen in deze les

Tangent

April 15th
t3d
12:05

#### Slide 1 -Tekstslide

Schedule
• Programme                                                                     5 min
• Review: hyperbolas, rational equations          10 min
• Tangent                                                                           15 min

Quizzes
• Practice                                                                          15 min
• Kahoot!                                                                           15 min

Programme

#### Slide 3 -Tekstslide

Review - 5 min - in your notebook

Do a) or b) on the right and upload a picture.
a) Draw the
graph of
b) Solve:
y=x16

#### Slide 4 -Open vraag

Intended Learning Outcomes
At the end of the lesson you can...
1. Calculate the tangent of an elevation
2. Recognize tangent in contexts
3. Calculate an angle with inverse tangent

#### Slide 5 -Tekstslide

The ____________ rule
3=26
a=cb

#### Slide 6 -Tekstslide

The ____________ rule
3=26
a=cb

#### Slide 7 -Tekstslide

What's the first word that
comes to mind?

#### Slide 8 -Open vraag

Have you ever seen such a sign?
Yes
No

#### Slide 9 -Poll

From linear graphs:

#### Slide 10 -Tekstslide

From linear graphs:

%      -------------->

What's the run
of the hill?
A
388.9 m
B
12.6 m
C
257.1 m
D
126.0 m

What is the run?
A
4.15
B
3024
C
30.24
D
414.8

Tangent
Solve.

#### Slide 14 -Tekstslide

Describe the relationship between the gradient of a hill, and its angle of elevation. (2 min)

Tangent
Solve.

#### Slide 16 -Tekstslide

A hill has an angle of elevation of 26 degrees. What is the grade?

A
26%
B
0.26
C
0.49
D
49%

#### Slide 17 -Quizvraag

Calculator:
grade = 0.49 * 100% = 49%

#### Slide 18 -Tekstslide

But what if...
...I want to know an angle, and I have the gradient?

#### Slide 19 -Tekstslide

But what if...
...I want to know an angle, and I have the gradient?

A
31.8 degrees
B
29.8 degrees
C
17.1 degrees
D
19.0 degrees

#### Slide 21 -Quizvraag

What's the angle of elevation for a gradient of 1? Explain.

Practice
Maths A/C
6, 8, 9, 13
17, 18, 19
Maths B/D
8, 10, 14
18, 20, 21

Kahoot!