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#1 2017-11-06 02:55:00

emmakatecumbo
Member
Registered: 2017-09-22
Posts: 30

Geometry homework

Here is my work I need help figuring out the answers Ill post the teachers comments down below.
What is the value of b if...
11.  a=6 and c=12
108
12. a=18 and c=30
576
13. a=7 and c=SQRT 85
14. a=1 and c=5
24
15. a=1 and c=SQRT 2
16. a=10 and c=12
44
17. a=21 and c=35
784
18. a=5 and c=18
306
19. a=6 and c=6(SQRT 2)
20. a=11 and c=12
23

teacher comments:
Make sure that you always STATE the final answer... if you end up wth c2 = 4... then c=2  which is the SQRT of 4.  Since 4 is a perfect square, you can give it's actual sqrt.  IF you were to get something like c2 = 5... your answer would just be c=√5.  Since 5 is NOT a perfect square, just leave the answer as a sqrt
Also... make sure that you understand when you SQUARE a SQRT... the operations CANCEL each other out and leave ONLY the number from under the radical!
Ex... √5 2 = √5 * √5 = 5
ex 2.... (2√5)2 = 2*2*√5*√5 = 4*5 = 20

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#2 2017-11-06 05:14:17

zetafunc
Moderator
Registered: 2014-05-21
Posts: 2,123
Website

Re: Geometry homework

Remember, you want the value of
such that
.

So for question 11, you have a = 6 and c = 12:




Do you see why the answer is
, not 108?

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#3 2017-11-07 12:34:11

emmakatecumbo
Member
Registered: 2017-09-22
Posts: 30

Re: Geometry homework

Yes i kinda understand, would all of the answers be that

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