Question

Grace is making party hats for her upcoming birthday party. A single hat has a diameter of 21 centimeters and a slant height of 38 centimeters. What is the lateral area of each party hat?

1,599.86 cm2

3,892.43 cm2

2,506.99 cm2

1,253.50 cm2

Answer 1

To start with, a party hat has a shape of a cone.

Answer 2

Also, the lateral area would be \({1\over2}\pi d\times \text{slant height}\)

Answer 3

@AlexPR787 @bobbylynn @RioAnne @DannyRomero19 @april115 @marcoduuuh

Answer 4

Are you going to try ParthKohli's formula?

Answer 5

my answer is b

Answer 6

Nope.

Answer 7

y not

Answer 8

Evaluate
\[ Area\ =\ \frac{1}{2}\pi d (slant\ height) \]
and you'd find out.

Answer 9

wait

Answer 10

0.5

Answer 11

and...

Answer 12

d=21 cm
slant height = 38 cm,
so area = ?

Answer 13

wait

Answer 14

0.2763

Answer 15

Try this on a calulator:
0.5 * 3.14 * 21 * 38

Answer 16

That's what I input in Google. ^

Answer 17

really^^^

Answer 18

1252.86

Answer 19

Hurray!
If you had used 3.1416, you would have got the exact value.

Answer 20

my answer is the 1 one

Answer 21

Would you like to look at all the answers before deciding? :)

Answer 22

i did

Answer 23

Which one is the closest to 1252?

Answer 24

last one

Answer 25

I agree!

Answer 26

thnk you so much

Answer 27

You're welcome! :)