Similar Triangles Using Slope

Which proportion could be used to show the slope of line VX is equal to the slope of line XZ?

Which of the following is true about the triangles shown on the graph?

• The slope of the smaller triangle is smaller than the slope of the larger triangle.

• The slope of the larger triangle is larger than the slope of the smaller triangle.

• The triangles are congruent. Congruent: same size, same shape.

• The slopes of the two triangles are the same.

Triangle ABC and triangle DEF...

• are different sizes,

  so their slopes are different.

• are on the same line,

  so they have the same slope.

Find the slope of the line using slope triangles

• A

• B

• C

• D

Find the slope of the line using slope triangles

• A

• B

• C

• D

Fill in the equation using the slope triangle and the red point (3,2).

b

c

d

e

4

3

2

7

5

Find the horizontal distance, vertical distance, and slope.

d

e

b

2

5

7

7/2

5/4

4/5

4

These are ​ (a)   triangles because they have the ​ (b)   shape but ​ (c)   size. The sides are ​ (d)   .

• similar

• congruent

• same

• different

• proportional

Find the measure of x:

• 6

• 24

• 33

• 36

Calculate the value of A'D'.

• 10

• 15

• 20

• 25