Question

HELP!!! FINALS TOMORROW! this is my study practice guide.
1. The polygons are similar, but not necessarily drawn to scale. Find the value of x
17.3my answer
10
120
160
2. State whether the triangles are similar. If so, write a similarity statement and the postulate or theorem you used.
OMN ~ JKO; SAS
OMN ~ OJK; SSS
OMN ~ OJK; SAS
The triangles are not similar.
3. Find the area. The figure is not drawn to scale.
114 in2my answer
57 in2
812 in2
957 in2

Answer 1

1.
12/3 = 40/x
=> x = 10

Answer 2

makes sense Brokellreals ?

Answer 3

Yes thank you! I ended up multiyplying the first time! Stupid mistake!

Answer 4

haha.. happens a lot wid me always.. :)

Answer 5

2.
clearly, OMN ~ OJK and its SAS similarity
3.
parallelogram area = bxh = 29 x 28 = 812 in2

Answer 6

Thank you so much your a big help!
What about finding the circumference could you help me with that?

Answer 7

circumference of what..

Answer 8

Find the circumference. Leave your answer in terms of pi .
100pi in
30pi in
10pi in
20pi in

Answer 9

Is it 20pi?

Answer 10

yup !! your have concepts... :P

Answer 11

Haha can you help me with a couple more? Sorry I hope you dont think im using you. Cram session before finals tomorrowD:

Answer 12

ya i understand how it is.. go ahead and post....

Answer 13

Find the length of arc XPY. Leave your answer in terms of PI .
900 pi m
15 pi m my answer
5 pi m
30 pi m

Find the area of the circle. Leave your answer in terms of pi .
8.405 m2
16.81 m2My answer
11.2 m2
4.2025 m2

Dont remember how to do this, but when I tried I got 51.8
Find the area of the figure to the nearest tenth.
8.6 in.2
51.8 in.2
103.6 in.2
16.5 in.2

Answer 14

1. ur answer is correct.. below explanation :
length of arc XPY = 2.pi x 10 - 2.pi x 10/4 = 20. pi - 5. pi = 15 pi

2.
area of circle = pi x r x r = pi x 2.05 x 2.05 = 4.2025 x pi m2

3.
the region shown is part of circle right ? so to find the area, just calculate the area of circle and take a piece of it ok. below solution :
area = pi x r x r x 165/360
= pi x 6 x 6 x 165/360
= pi x 36 x 165/360
= pi x 165/10
= 16.5 pi in2

Answer 15

So for 3, whenever i get a question like that. Even if the circle is a little bigger, do I stick to that same formula but change the numbers?

Answer 16

yup you will get the answer.. .
but when you have time just try and figure out how it works... (may be after d exam.. ;))

Answer 17

Haha defiantly I wanna be a dentist so I need to get this whole math thing down!
Do you know how to do tangets? I think I got it figured out, but I dont wanna be stuck on doing it the way im doing it and have it turn out that I was doing it wrong. Its happened before, sophmore year!D: