Question

Need help with 1-4.

Answer 1

Answer:

for number 4 the answer is 32 in (please read below)

Step-by-step explanation:

I will do one of them for now... how about number 4.

Similar triangles means we are going to setup a proportion:

                          Small triangle                                 Big Triangle

Corresponding       12                                                     15

Corresponding        x                                                      40

So the proportion is 12/x=15/40

cross multiply

12(40)=15(x)

Divide both sides by 15

giving x=12(40)/15=32

Try number 1... And I will check it for you (just post as a new question-I will be looking for it)

Answer 2

Answer:

1. 8 cm

2. 15 cm

3. 28 cm

4. 32 cm

Step-by-step explanation:

1. 12/6= 2

  20/10= 2

  Scale Factor= 2

  16/2= 8cm

2. 30/18= 1.6666667

   15/9= 1.6666667

   Scale Factor= 1.6666667

   25/1.6666667= 15cm

3. 16/12= 1.333333

   32/24= 1.333333

   Scale Factor= 1.333333

   (21)(1.333333)= 28cm

4. 15/12= 1.25

   25/20= 1.25

   Scale Factor= 1.25

   40/1.25= 32cm