Or

Tutorial

WHOLE CLASS

- Introduction to the compass kit
- safety
- taking care of kits
- troubleshooting problems with the compass (lead)

CALL MRS. KIRCH OVER TO DISCUSS

- How many tries did it take you?
- How accurate is your picture?
- What's the hardest part?

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- Recite steps for drawing a triangle given 3 sides
- What acronym can we give this?

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- What questions do you have about constructing SSS?
- Why was triangle #7 impossible?
- What can we conclude about drawing triangles given 3 sides? Under what circumstances will the triangle be impossible?

**COMPLETE PW 4.12 AND THEN CHECK YOUR ANSWERS BELOW**

**#1-10 - Use the patterns you saw to decide. Include a 1 sentence explanation
#11-14 - Use your compass, ruler, and pencil to construct**

IPOD ACTIVITY - page 41

*Need colored set of 7 triangles for each group of 2 or 4

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- Check labels on all 7 triangles

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- What did you notice about the categories when divided into scalene, isosceles, and equilateral?
- What did you notice about the categories when divided into acute, obtuse, and right?
- What are Google's definitions of all 6?
- Which two couldn't be drawn from the chart?
- Go over how to mark sides and angles correctly as congruent.

COMPLETE PW 4.13 AND THEN CHECK YOUR ANSWERS BELOW

#15-24 make sure you have two descriptive words for each problem

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- What were your 3 observations?
- Which ones did you list under the "confusing" section that we need to go over?

COMPLETE PW4.14 AND THEN CHECK YOUR ANSWERS BELOW

#25-29 use your conclusions from the linguine activity. Include a 1 sentence explanation with each answer.

#30-34 make sure you have two descriptive words for each problem

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- What were the possibilities you came up with?

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- Check the 5 drawings
- What transformations did you use? Show me
**KEY IDEA: If you are given ________, the triangles will always be __________ to each other no matter which way you draw them.**

COMPLETE PW4.15 AND THEN CHECK YOUR ANSWERS BELOW

#35-49 Your reason will either be SSS or something else.

*It is only congruent (right now) if you find SSS.

**Remember that VERTICAL ANGLES are congruent, and if two triangles share a side, that side is congruent.

CALL MRS. KIRCH OVER TO DISCUSS

- What triangle(s) did you draw?
- What is different about this construction from SSS (#2)
- Did everyone draw the same triangle? If not, what does this mean? (#3)
- Summarize the two big things we've learned so far this unit. (#4)

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- How many triangles did you draw? Show me
- Are the triangles in #1 and #5 congruent? Why or why not? Show me.

COMPLETE PW 4.16 AND THEN CHECK YOUR ANSWERS BELOW

#50-61 use what you remember from before break (Supplementary, Complementary, Angles in a Triangle, Vertical Angles, Exterior Angles) to answer the questions.

PAGE 51-52 (TBD)

COMPLETE PW 4.17 AND THEN CHECK YOUR ANSWERS BELOW

#62-73 Your reason will either be SSS, SAS, ASA/AAS, or ***/SSA It is only congruent if you find SSS, ASA/AAS, or SAS. Remember that VERTICAL ANGLES are congruent, and if two triangles share a side, that side is congruent.

PAGE 55-56

This is a partner/group practice problem solving test. Read carefully, discuss, and call me over if you need help.

CALL MRS. KIRCH OVER TO DISCUSS

- Is Adeline correct?
- Is Suzie correct?
- Is Wally correct?

Triangles and Congruence Skills Test #2 Review (Version 1)

PAGE 57

This is a partner/group practice problem solving test. Read carefully, discuss, and call me over if you need help.

DIRECTIONS: Decide if the pairs of triangles described can be congruent or not. Write a reason for your answer.

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- Which ones were "no"?
- Which ones were "yes"?
- What was your answer for #5? Why?

Triangles and Congruence Skills Test #2 Review (Version 2)

PAGE 59-60

This is a partner/group practice problem solving test. Read carefully, discuss, and call me over if you need help.

PLEASE NOTE: This is a sample "proof" from 2 students about Card 5 from the page 57 activity. Refer to your notes from that activity while discussing

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- Do you agree with Jorge, Kieran, or neither? Explain.

Triangles and Congruence Skills Test #2 Review (Version 3)

PAGE 61-62

CALL MRS. KIRCH OVER TO DISCUSS

- Is Ben correct?
- Is Sanjay correct?
- Is Max correct?

Triangles and Congruence Skills Test #2 Review (Version 4)