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3/15 Bell Ringer

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3/15 Bell Ringer

6

Homework: pg 493 #1 – 6,9,11

√3

y

x

12

These two triangles are similar. Use a proportion to solve for x and y:

Grab a bell ringer sheet from the front of the room!

60°

1

- I CAN find missing sides of 45-45-90 and 30-60-90 Triangles.
- 1. Bell Ringer
- 2. Why is this a shortcut?
- 3. Two examples to figure all of this out.
- 4. Fix it up!
- 5. ACT Question of the Day

- Mr. Chrischilles’ Clicker
- Perfection Award: 3rd Period
- Hand in Bell Ringers from last week if you didn’t turn them in on Friday.
- Hand in Hawkeye Makeup if you did it.

- Where does 5√2 come from?
- Let’s assume we want to find c if a and b = 5.
- Pythagorean Theorem: a2+b2=c2
- 52 + 52 = c2
- 25 + 25 = c2
- 50 = c2
- C = √50

6

45°

- What type of triangle is it?
- 45-45-90

- What do we know?
Hyp = Leg x √2

C = a√2

Leg (a) = 6

- Find out:
C = 6√2

- What if we knew c and wanted to find the legs?

6

C

45°

3

60°

B

C

- What type of triangle is it?
30-60-90

- What do we know?
C = 2a

B = a√3

a = 3

- Find out:
C = 2(3) = 6

B = 3√3

- What if you only knew that c = 6. How would you find a and b?

30°

- If you were not here Friday, work on the 30-60-90 Independent Practice first, then check your 45-45-90 IP.
- If you didn’t finish one of the Independent Practices, finish it now.
- If you finished both, check your work, making sure you didn’t write answers as decimals.
- If you finish all of this, get the bonus sheet from the front of the room and work on it
- ALL WORK WILL BE HANDED IN AT THE END OF CLASS AND WILL BE GRADED FOR ACCURACY!!!

- Find the value of x:
- A. 2
- B. 4√3
- C. 4√2
- D. 8
- E. 2√3

x

60°

4

30°

New grades are posted, check yours

Homework: pg 493 #1 – 6,9,11