Introduction to Similar triangle

Introduction to Similar triangle

By Hok Hei Ngan

Draw

Fill in the blanks.

Strategie to match the ∆s

1. Check the value of the angles. Highlight the angles with the same value with the same color.

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2. Check the length of the sides and arrange them in ascending order. Read the name in clockwise direction.

Let's practice!

Multiple Choice

• ∆QGK~∆FMN

• ∆GKQ~∆FMN

Multiple Choice

• ∆STG~∆KPQ

• ∆STG~∆PKQ

Multiple Choice

Write down the pair of similar triangles.

• $$∆CPT\sim∆GQV$$  

• ∆CTP~∆GVQ

• ∆CTP~∆VGQ

Multiple Choice

Write down the pair of similar triangles.

• ∆PQR~∆ZYX 

• ∆PQR~∆XYZ

• ∆PQR~∆XZY

Multiple Choice

Write down the pair of similar triangles.

• ∆LMN~∆GEF

• ∆LMN~∆EFG

• ∆LMN~∆FEG

Multiple Choice

Write down the pair of similar triangles.

• ∆PQR~∆XYZ

• ∆PQR~∆XZY

• ∆PQR~∆ZYX

Example 1

Subject | Subject

Some text here about the topic of discussion

Multiple Choice

Find the unknowns in each of the following pairs of similar triangles.

Put down your step in the classwork book.

• x=36˚ ; y=100˚

• x=100˚ ; y =36˚

• x=44˚ ; y=100˚

• x=100˚ ; y = 44˚

Multiple Choice

Find the value of unknowns.

Put down your step in your classwork book.

• x= 21 ; y = 18

• x=18 ; y = 21

• x=4.5 ; y = 10.5

• x=10.5 ; y= 4.5

Multiple Choice

Find the value of a.

• 64˚

• 116˚

• insufficient information

• 15˚

Multiple Choice

Find the value of b.

• 10

• 12

• 9

• 22.5

Multiple Choice

Find the value of a.

• 9

• 12

• 15

• 16

Multiple Choice

Find the value of b.

• 20

• 15

• 10

• 12

Multiple Choice

Find the value of c.

• 37˚

• 53˚

• 37

• 53

Open Ended

What is the value of $$\angle EDC$$  ?

Open Ended

What is the value of $$\angle CED$$  ?