Head First 2D Geometry

you are here 4 51

similarity and congruence

Liz wants you to etch her phone

Time to get to work. Liz has picked a design she loves for her

new cell phone, now all you have to do is engrave it on the back.

I really like

this design here

with the sunset…

isn’t it perfect?

Sketch before you etch! Copy the design Liz has chosen (it

doesn’t matter if it’s messy!) and think about what you’re paying

attention to when you copy.

What three things do you need to know about each line in order

to be able to sketch, and then etch, the design accurately?

1)

2)

3)

Sketch here

This is the design

Liz chose.

myPod-designs-(c) 2007

sharpen solution

52 Chapter 2

Sketch before you etch! Copy the design Liz has chosen (it

doesn’t matter if it’s messy!) and think about what you’re paying

attention to when you copy.

What three things do you need to know about each line in order

to be able to sketch, and etch, the design accurately?

1) How long each line is

2) What angle each line is at

3) Where the line is (what position it starts/ends)

When you sketch the design, you need to think about these things: