Math Is Fun Forum

owenflo

Member

Registered: 2014-07-21

Posts: 115

PLEASE HELP FAST thanks

19. a=6 and c=6(SQRT 2)

Ab= 13
Bb= 15
C b= 8
Db= 6
E b= 19
F b= 2

I've done it multiple times and i cant get the correct answer.
6^2+b^2=6SQRT2

6*SQRT 2=8.5

36+b^2=8.5

b=SQRT 73

The answer is D.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: PLEASE HELP FAST thanks

19. a=6 and c=6(SQRT 2)

Ab= 13
Bb= 15
C b= 8
Db= 6
E b= 19
F b= 2

I am sorry but I can not understand that. What are you trying to solve?

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

owenflo

Member

Registered: 2014-07-21

Posts: 115

Re: PLEASE HELP FAST thanks

Pythagorean Theorem
a^2+b^2=c^2

a=6
c=6(SQRT2)

6^2+b^2=6(SQRT2)
36+b^2=6*SQRT2

I am having trouble because 6(SQRT2)=8.5

the answers are all whole numbers so please help

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: PLEASE HELP FAST thanks

You are trying to solve for b?

D is correct, b = 6.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

phanthanhtom

Member

Registered: 2012-06-22

Posts: 290

Re: PLEASE HELP FAST thanks

Why should 6*SQRT2 = 8.5?

Also you forgot to square c:

a^2 + b^2 = c^2

6^2 + b^2 = 6^2*(SQRT2)^2

36 + b^2 = 36*2

b^2 = 36

b = 6

OK?