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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

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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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