Comparing and Scaling

1. Explain what you think each word means when it is used to make a comparison.
a) ratio- what to what

b) percent-` numerator divided by denominator

c) fraction- part to whole

d) difference – SUBTRACTION






2) Give an example of a situation using each concept to compare two quantities.
(150 total seventh graders, 80 girls, 70 boys)
a) ratio-80:70

b) percent-80/150=53% 70/150=46%

c) fraction-80/150 70/150

d) difference- 80-70=10

Math Reflections Inv. 4

Answer the following questions on YOUR blog as a post. Use the same title as mine for your post. Write your answers in complete sentences! An easy way to do this is to copy and paste the questions below onto your post and then put your answers in a different color!


1) What has to be the same in order for two parallelograms to be similar?
The angles and shape.

2) Describe a way to find a missing side length in a pair of similar figures.
You can do ratios like short to long short to long or long to short long to short.

3) I have a small isosceles triangle with a base of 3 inches and other sides are 4 inches.I want to create a similar isosceles triangle with a base of 7.5 inches.What should the other side lengths be and why?
the side lengths would be 10 by 10 by 7.5