Question

area of a parallelogram did i do this right ?

Answer 1

i got 105?

Answer 2

Yeah 105 is correct answer.

Answer 3

what about unit?

Answer 4

thanks and um that would be cm

Answer 5

No.

\(\text{cm}\times\text{cm} = \text{cm}^2\), right?

Answer 6

Since you did \(7~\text{cm}\times 15~\text{cm}\)

Answer 7

oh yes i forgot sorry

Answer 8

okay, so answer is \(105~\text{cm}^2\)

Answer 9

ok so @geerky42 is this right

Answer 10

Unit is wrong

Answer 11

You did \(\dfrac{1}{2} (8~\text{cm}\times10~\text{cm}) \)

Answer 12

yes

Answer 13

so cm3

Answer 14

How?

Answer 15

1/2 x 8 x 10

Answer 16

1/2 has no unit

Answer 17

oh wait cm2

Answer 18

yeah

Answer 19

ok

Answer 20

You can treat units like variable

Answer 21

\(\text{cm}\times\text{cm} = \text{cm}^2\)

Just like how \(x\times x = x^2\)

Answer 22

ah ok that makes more sense

Answer 23

i see

Answer 24

what about this

Answer 25

@geerky42

Answer 26

Area should be \(3.14~\text{yd}^2\)

Answer 27

how is that

Answer 28

Because you have \(\pi r^2\)

So you squared unit too.

Answer 29

\[\pi r^2~~~\rightarrow~~~\pi(1~\text{yd})^2\]

Answer 30

ohh

Answer 31

Yeah. What about circumference?

Answer 32

ok and my circumference is 6.28yd2

Answer 33

why \(\text{yd}^2\)?

Answer 34

2*3.14

Answer 35

\[2\pi r ~~~\rightarrow~~~2\pi(1~\text{yd})\]

Answer 36

that "2" has no unit.

Answer 37

ah ok so circumference is usually 1pi

Answer 38

\[C = 2\pi (1~\text{yd})\]

Answer 39

So 6.28 yd

Answer 40

yeah that's the formula i used

Answer 41

ok

Answer 42

im not sure what to do here

Answer 43

It's basically semicircle subtract triangle

Answer 44

if the radius is 6 that means the diameter is 12

Answer 45

huh? so how do I start to solve

Answer 46

find area of triangle and area of semicircle, then you do

semicircle - triangle

Answer 47

ah ok onr sec

Answer 48

wait but only the height is given for the triangle how would i find the base