Similar Triangles

Similar triangles

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Slide 1: Diapositive

WiskundeMiddelbare schoolvwoLeerjaar 3

Cette leçon contient 23 diapositives, avec quiz interactifs et diapositives de texte.

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Similar triangles

You need your notebook, calculator and Ipad

Slide 1 - Diapositive

Calculate ∠A

timer

1:00

Slide 2 - Question ouverte

Calculate ∠A

Slide 3 - Diapositive

What is the length of PR?

Slide 4 - Question ouverte

What is the length of PR?

Slide 5 - Diapositive

11.6 Similar triangles

Slide 6 - Diapositive

Slide 7 - Diapositive

Slide 8 - Diapositive

Which triangle is similar to triangle ABC?

PQR

KLM

DEF

None of the above

Slide 9 - Quiz

11.6 Similar triangles

Triangle ABC is similar to FDE, so their shapes are equal.

The letters referring to the matching angles are on the same space. So not necessarily in alphabetical order.

Δ A B C

Δ F D E

Slide 10 - Diapositive

Δ A B C

Δ F D E

Slide 11 - Diapositive

Δ A B C

Slide 12 - Diapositive

ABC is congruent with triangle ...?

Δ A B C

Δ A B C

Δ A B C

DEF

DFE

FED

FDE

Slide 13 - Quiz

Δ A B C

Slide 14 - Diapositive

Calculations in similar triangles

Slide 15 - Diapositive

Slide 16 - Diapositive

Slide 17 - Diapositive

Calculations in similar triangles

To calculate lengths in similar triangles, we use a scale factor. In this example the scale factor is 20 : 8 = 2,5. So every side in triangle DEF is 2,5 times as big as the sides in ABC.

Slide 18 - Diapositive

What is the length of VS?

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1:00

Slide 19 - Diapositive

Hoe lang is zijde VS?

Slide 20 - Question ouverte

What is the length of VS?

Slide 21 - Diapositive

Bettermarks

Homework and equipment check
Bettermarks 11.6
Raise your finger if you have any questions or when you're finished
Communicate in English please

Slide 22 - Diapositive

Leerdoelen

Je kent de drie regels van gelijkvormigheid
Je kan lengtes van zijden uitrekenen met behulp van gelijkvormigheid

Slide 23 - Diapositive