Week 5 Thursday

Week 5 Thursday

Review and Pythagorean Theorem

Multiple Choice

Which of the following formulas is used on your formula sheet for Pythagorean Theorem?

• a²+b²=c²

• a²-b²=c²

• c²+b²=a²

• a²+c²=b²

measurements are on the sides for Pythagorean Theorem

units (cm, in, ft, yd, etc)

LABEL YOUR SIDES

short means subtract

long means add

Multiple Choice

Are you missing a short side or the long side?

• short

• long

Multiple Choice

Will you add or subtract?

• add

• subtract

Multiple Choice

What is the missing side?

• √20²+12²=23.3

• 20²-12² = 256

• √20²-12² =16

• 20²+12² = 544

Work through this example. Once you think that you are done, hit next for questions

Multiple Choice

• A

• B

• C

• D

Why?

• first you had to label your sides short short long

• s s l

• the short sides were 36 and 25

• the long side was 49

• you have to add the short sides to get the long side

• the formula says a²+b²=c²

Multiple Choice

• A

• B

• C

• D

When they give you all three measurements...

• the largest number will always be c

• use the formula in the calculator

• true means it is a right triangle

• false means it is not a right triangle

example

the largest number is 61

so 61 will be used last

in the calculator type

60² + 11² = 61²

does the calculator say true or false?

Multiple Choice

• yes

• no

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• 13.3

• 10.1

• 12.4

• 11.9

WHEN YOU SEE SQUARES, THAT REPRESENTS AREA

AREA IS THE BIG NUMBER

DRAW THE FIGURE AND FILL IN THE BOXES WITH THE NUMBERS THEY GAVE YOU

AREA IS THE BIG NUMBER

LABEL YOUR BOXES SHORT SHORT LONG

SO YOU KNOW WHETHER TO SUBTRACT OR ADD

Multiple Choice

What did you write in box 1?

• 80

• 100

• x

Multiple Choice

What did you write in box 2?

• 80

• 100

• x

Multiple Choice

What did you write in box 3?

• 80

• 100

• x

Multiple Choice

Will you be adding or subtracting?

• adding because x is on the L side.

• subtracting because x is on the s side.

Multiple Choice

Because the numbers are in squares, they are already squared so just add them.

• 20

• 80

• 30

• 180

Now you try!

Use your notes if you forget.

Fill in the Blank

If square 2 is 300 units², and square 3 is 112 units², what is the area of square 1?

Fill in the Blank

If square 2 is 500 units², and square 1 is 112 units², what is the area of square 3?

Fill in the Blank

If square 3 is 84 units², and square 1 is 144 units², what is the area of square 2?

The rules are the same for word problems

a²+b²=c²

Multiple Choice

Does the ladder represent the longest side or the short side?

• longest ( so add)

• short (so subtract)

Multiple Choice

• 20 feet

• 3 feet

• 12 feet

• 15 feet

AWESOME JOB!!

time to work on some old lessons

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• 38

• 180

• 62

• 80

Multiple Choice

• A

• B

• C

• D

TIME FOR THE MOL!!!