Introductory Activity: Properties of Similar Triangles

Introductory Activity

Move point A, B or C to create any triangular shape, then answer the following questions.

Properties of Similar Triangles

Question 1

Tell whether triangle DEF is a scaled copy of the original triangle ABC. If yes, what is the scale factor? Reminder: To find the scale factor, you should divide each side of the scaled copy by its corresponding side of the original triangle.

Compare the angles of the triangles ABC and DEF.

Question 2

The angles of triangles ABC and DEF are:

Sæt kryds ved dit svar

A
Congruent
B
Not congruent

Tjek mine svar (3)

Question 2

The angles of triangles ABC and DEF are:

Sæt kryds ved dit svar

A
Congruent
B
Not congruent

Tjek mine svar (3)

Question 4: Properties of Similar Triangles

3) What are the properties of two similar triangles? What can you say about: a- The angles? b- The sides?

Question 4: Properties of Similar Triangles

3) What are the properties of two similar triangles? What can you say about: a- The angles? b- The sides?

Question 4

3) What are the properties of similar triangles? a- What can you say about the angles of two similar triangles? b- What can you say about the sides of two similar triangles?

Introductory Activity: Properties of Similar Triangles