# Unit 2 Summary

### What do I need to know from Chapters 9 & 10?

## Measuring Length & the Metric System

3 ft = 1 yd

5280 ft = 1 mile

*Metric System: 1 km = 1000 m

1 hm = 100 m

1 dam = 10 m

1 dm = 0.1 m

1 cm = 0.01 m

1 mm = 0.001 m

* Dimensional Analysis - changing units within the English system, within the Metric system, and change units from English to Metric and vice versa

Watch the great examples here! https://www.youtube.com/watch?v=DsTg1CeWchc (ignore that it says it is for chemistry - these are the exact problems that you need to know how to do!)

*Review your 9.1 homework and see http://sites.gpc.edu/tlamar2/chapter-9-math-1001/

The helpful mnemonic chart below (King Henry) is courtesy http://www.shelovesmath.com/

## Area & Volume

*Volume measured in cubic units

Converting square units: https://www.youtube.com/watch?v=lKguj4goNT8

Converting cubic units: https://www.youtube.com/watch?v=Fe5LyVW0vRg

*Review your 9.2 homework and see http://sites.gpc.edu/tlamar2/chapter-9-math-1001/

## Weight & Temperature

See https://www.youtube.com/watch?v=NqbkvEK46xM for examples

* Weight

English system: 16 oz = 1 lb 2000 lbs = 1 T

Metric system: 1 kg = 1000 g 1 hg = 100 g 1 mg = 0.001 g

(see picture below)

* Convert from weights from English system to Metric system

See https://www.youtube.com/watch?v=LGI34L4pw_w for examples

*Review your 9.3 homework and see http://sites.gpc.edu/tlamar2/chapter-9-math-1001/

## ON PAGES 607-608 IN YOUR E-TEXTBOOK, TAKE THE CHAPTER 9 TEST. EACH QUESTION HAS A VIDEO CAMERA ICON ON THE LEFT WHERE YOU CAN SEE THE PROBLEM WORKED OUT AFTER YOU TRY IT.

## Triangles

* Solve applications using similar triangles

Examples: http://www.mathsteacher.com.au/year9/ch13_geometry/08_similar/similar.htm

* Apply the Pythagorean Theorem

Examples: http://www.regentsprep.org/regents/math/algebra/AT1/PracPyth.htm

*Review your 10.2 homework and see http://sites.gpc.edu/tlamar2/chapter-10-math-1001/

## Perimeter and Area

*apply this information to solve word problems involving perimeter and area

Perimeter formulas and practice: http://www.mathsisfun.com/geometry/perimeter.html

Area formulas and practice: http://www.mathsisfun.com/area.html

*Review your 10.3 & 10.4 homework and see http://sites.gpc.edu/tlamar2/chapter-10-math-1001/