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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. 3/15 Agenda. I CAN find missing sides of 45-45-90 and 30-60-90 Triangles.

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3 15 bell ringer

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

3 15 agenda
3/15 Agenda
  • 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
news and notes
News and Notes
  • 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 this come from
Where does this come from?
  • 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
example 1
Example #1

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°

example 2

3

Example #2

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°

what do i do now
What do I do now?
  • 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!!!
act question of the day
ACT Question of the Day
  • 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

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