Question

Please can I get help with geometry? Tomorrow's my birthday and I really don't want to have to do any work.

Answer 1

if we notice, we can "cut off" the upper triangle and move it down here

Answer 2

similar principle here

after we move these triangles around we end up with a giant rectangle with length 7 and width 6, what's this area?

Answer 3

42?

Answer 4

good, so 42 is your ans

Answer 5

thanks so much, would you mind helping me with the others?

Answer 6

sure

Answer 7

thanks so much I'll post it

Answer 8

volume of a square pyramid = (1/3)(b)(h), b is the area of the base, h is height

so if the base is a square w/ side lengths 4 what's the total area of the base?

Answer 9

48?

Answer 10

oh, 48 for the entire volume? yeah that's the final answer

Answer 11

okay great :) I'll put up the next one

Answer 12

similar concept

area of cone = (1/3)(base)(height)

the base this time is a circle so you will first need to calculate the area of a circle with diameter 12

Answer 13

okay I'll try

Answer 14

113.1 is the area of the circle

Answer 15

good but let's leave it as 36pi for now and round at the very end

if we multiply (1/3)(bh) we get (1/3)(36pi)*27 = 972pi, then we plug in 3.14 for pi at the very end, getting 972 * 3.14 = 3052.08 = your ans

Answer 16

okay, thanks. questions like this one I don't understand since im not sure what to do with pi

Answer 17

for accuracy/precision, we would leave it in terms of pi until the very end, if we start rounding in between steps we run the risk of losing accuracy

Answer 18

okay, is there anything left to do with this one or was that the final answer?

Answer 19

that's it

Answer 20

V = (4/3)pi* r^3, you are given diameter not radius, so you'll have to divide the diameter by 2 to find the radius, then plug everything into the formula for V

Answer 21

25 m radius

Answer 22

so it would by V=(4/3)3.14 25^3 =

Answer 23

good but they want it to the nearest hundredth so you would round that decimal to 2 places

Answer 24

okay

Answer 25

would it happen to be this? 523,333.33

Answer 26

then round up to 65416.67 = your ans

Answer 27

i was way off XD thank you though

Answer 28

Perimeter = 48 = 2(L+W)

dividing both sides by 2 we get

L + W = 24

"length and width scaled up by 1.5" means the new length and new width are 1.5L and 1.5W respectively

new perimeter = 2 * 1.5(L+W) = ?

remember we determined what L + W was before, what would 2 * 1.5(L+W) be?

Answer 29

48?

Answer 30

if (L+W) = 24 what does 2 * 1.5 * (L+W) equal?

Answer 31

3

Answer 32

since (L+W) = 24, we can replace "L+W" with "24" whenver (L+W) shows up

so 2 * 1.5 * (L+W) = 2 * 1.5 * 24 = ?

Answer 33

72?

Answer 34

good, so 72 is your final answer

Answer 35

yay :)

Answer 36

for area, since it's base * height we have to multiply the scale factor twice to get the new area

so new area = old area * scale factor * scale factor = ?

Answer 37

8?

Answer 38

the old area is 30

the scale factor is 4

so new area = old area * scale factor * scale factor = ?

Answer 39

im not understanding what im supposed to do here

Answer 40

120 is new area

Answer 41

30 * 4 * 4 = ?

Answer 42

480 i mean

Answer 43

good so 480 = your ans

Answer 44

awesome

Answer 45

for volumes, we need to multiply the scale factors three times, since there are 3 dimensions being scaled

so the ratio is 6^3 : 7^3, express this ratio in lowest terms

Answer 46

anyway I got to go, it just ends up being 216: 343 I believe, it doesn't simplify any further

Answer 47

okay, thank you so much for all your help i really appreciate it. have a good day :)