Topic 7 Similarity Review Day 1

​Topic 7 Common Assessment Review Day #1

Similar Triangles

Similar Triangles

1. Use similarity rule to match up corresponding sides.

2. Set up a proportion with fractions of correspoinding sides

3. Solve by cross multiplying (or easiest algebra method for you)

​Example:

​If ΔAGM ∼ ΔKXD, find the value of x.

Dropdown

​If ΔJKL ∼ ΔNML, find the values of x​​ and y.​



x=​ ​ ​

Select answer

​

and

y=​ ​ ​

Select answer

Fill in the Blank

​If ΔTLY ∼ ΔCHK, find LY.​

LY =​ ​__ (Enter a number only)

Scale Factor

Scale Factor

1. Identify preimage (old) and image (new)

2. Set up a fraction k of coresponding sides or points.

3. Reduce the fraction

​Example:

Math Response

Find the scale factor k for the dilation.

(Enter as a number, fraction, or decimal.)

Type answer here

Correct Answer: 3

Deg^°

Rad

Dilation

Dilation of Coordinates

Example

Find the new coordinates after the following transformation:

dilation of 3/2 about the origin

E(-1,2), F(1, 3), G(2, 0)

1. Multiply each x and y coordinate in the ordered pair by the scale factor.

Graphing

Find the new coordinates afte the following transformation:

Dilation of .5 about the origin:

J(-2,2), K(4, 4), L(0, -2)

Dropdown

Perform the following transformation:



Dilation of 2.5 about the origin.

(Choose the correct coordinates)



U'​ ​

Select answer

, V'​​

Select answer

, W'​

Select answer

​

Math Response

Find the scale factor:

(Enter the number as a fraction, decimal, or integer)

Type answer here

Correct Answer: \frac{5}{2}

Deg^°

Rad