Question

what is the scale factor of similar figures the small one is 4cm and the big one is 8.4cm

Answer 1

Can someone help please I'm confused with the decimal

Answer 2

just divide 8.4/4

Answer 3

8.4=84/10

Answer 4

if your first shape is 4
and you want to get to the big shape which is 8.4

then your scale factor is the second shape divided by the first shape
8.4/4 is your scale factor

Answer 5

its 2.1 right?

Answer 6

84/10*1/4=84/40=2.1

Answer 7

yes

Answer 8

yeah thanks i have one more

Answer 9

i can help

Answer 10

ok this is a word problem says a dartboard is octagonal each side measures 9 in the copy of the board was smaller by a scale factor of .25 what is the side length

Answer 11

alex don't help if you are not going to explain how you did it lol

Answer 12

just multiply 9*0.25

Answer 13

2.25 and all u do is multiply the side length times the smaller scale factor?

Answer 14

yes

Answer 15

really that easy?