Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

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## #1 Re: Help Me ! » Geometry review. » 2016-06-06 11:14:56

okay, thank you. I'm submitting the lesson hopefully I get 20/20 !

## #2 Re: Help Me ! » Geometry review. » 2016-06-06 11:10:37

so if I simplify, it would be 112.82 m^2?

## #3 Re: Help Me ! » Geometry review. » 2016-06-06 10:40:48

I guess the grey area is the shaded region.

## #4 Re: Help Me ! » Geometry review. » 2016-06-06 10:37:51

it looks tough because you have to figure out the shaded region.

## #5 Re: Help Me ! » Geometry review. » 2016-06-06 10:17:57

okay, thank you!

now question 20 is hard, I never understand and remember how to do it

## #6 Re: Help Me ! » Geometry review. » 2016-06-06 10:16:32

20. Calculate the area of the shaded region in the figure shown.

5.04 ft?

## #8 Re: Help Me ! » Geometry review. » 2016-06-06 10:08:00

the height is 5.04?

cos(65) = x/12
.42=x/12
5.04=x

## #10 Re: Help Me ! » Geometry review. » 2016-06-06 10:00:19

well that's what my teacher put in the question, so I didn't write the whole number.

so:
cos(65) = x/12
.42=x/12?

cos(65)=0.42

## #12 Re: Help Me ! » Geometry review. » 2016-06-06 09:42:11

oh okay. no I don't know hot to get cos(65)

I did 65 * 12.

## #14 Re: Help Me ! » Geometry review. » 2016-06-06 09:29:58

cos(65 degrees) = x/12
cos(780)=x

## #15 Re: Help Me ! » Geometry review. » 2016-06-06 07:11:55

a little. we did one lesson on it.
sin = opp./hyp.

## #16 Re: Help Me ! » Geometry review. » 2016-06-06 06:57:12

What do you mean? I don't understand what formula I would be using to get the answer.

## #17 Re: Help Me ! » Geometry review. » 2016-06-05 13:15:52

18. In the diagram shown, a 12-foot slide is attached to a swing set. The slide makes a 65 degree angle with the swing set. What is the height of the top of the slide (as close as you can get)?

sin 65 degree = 0.91
cos 65 degree = o.42
tan 65 degree = 2.14

## #18 Re: Help Me ! » Geometry review. » 2016-06-05 08:57:55

What is the length of the line segment with endpoints (-8,6) and (-10,-1)?
Okay, thank you, enjoy your day.

## #19 Re: Help Me ! » Geometry review. » 2016-06-05 08:42:02

yes, sorry I didn't notice that.
for 15 I'm not sure what formula I should use.

120 right?

## #21 Re: Help Me ! » Geometry review. » 2016-06-05 08:37:30

how did you get 60?

## #22 Re: Help Me ! » Geometry review. » 2016-06-05 08:32:52

okay, so my answer for 14 is wrong?

## #23 Re: Help Me ! » Geometry review. » 2016-06-05 08:28:11

Yes the hexagon in the middle.

would 13 be:
(n-2)180
(6-2)180
(4)180
720

would 14 be:
720/6
120

## #25 Re: Help Me ! » Geometry review. » 2016-06-05 08:06:04

Okay, I understand.