Free Math Help Forum - Geometry and Trig
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Ask your questions about all levels of geometry from elementary school through college.enTue, 22 Jan 2019 10:32:24 GMTvBulletin60https://www.freemathhelp.com/forum/images/misc/rss.pngFree Math Help Forum - Geometry and Trig
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80 degrees
https://www.freemathhelp.com/forum/threads/114225-80-degrees?goto=newpost
Mon, 21 Jan 2019 14:48:44 GMTCan anyone help me see why ACB is 80 degrees?
I have tried playing with parallel lines and basic ideas of geometry and some similar triangles...Can anyone help me see why ACB is 80 degrees?

I have tried playing with parallel lines and basic ideas of geometry and some similar triangles stuff.
Any hint please?

]]>Geometry and Trigapple2357https://www.freemathhelp.com/forum/threads/114225-80-degreesGeometry help needed by guitar builder
https://www.freemathhelp.com/forum/threads/114219-Geometry-help-needed-by-guitar-builder?goto=newpost
Sun, 20 Jan 2019 20:42:51 GMTAttachment 10932 (https://www.freemathhelp.com/forum/attachment.php?attachmentid=10932)flowRoot4224.jpg

]]>Geometry and Trigpjdeklerkhttps://www.freemathhelp.com/forum/threads/114219-Geometry-help-needed-by-guitar-buildertrigonometry identities equation
https://www.freemathhelp.com/forum/threads/114217-trigonometry-identities-equation?goto=newpost
Sun, 20 Jan 2019 18:34:16 GMTHi I struggle with equation ((1+sin(2x)+cos(2x)) / (1+sin(2x)-cos(2x))) =Cot(x) tried lots of different identities for 2 houres and have no...Hi I struggle with equation ((1+sin(2x)+cos(2x)) / (1+sin(2x)-cos(2x))) =Cot(x) tried lots of different identities for 2 houres and have no progres I had some more simple one explained on lecture and understand basic way of do it, but have no luck will be apreciated any clues. Thanks.
]]>Geometry and Trigpawelwolfhttps://www.freemathhelp.com/forum/threads/114217-trigonometry-identities-equationUnit Circle Trigonometry Quick Question
https://www.freemathhelp.com/forum/threads/114214-Unit-Circle-Trigonometry-Quick-Question?goto=newpost
Sun, 20 Jan 2019 15:21:07 GMTThis is just a simple question but I can’t find the solution to this problem online and our teacher never explaines this part:
Find all possible...This is just a simple question but I can’t find the solution to this problem online and our teacher never explaines this part:

tan(θ)=3
]]>Geometry and TrigWahamukahttps://www.freemathhelp.com/forum/threads/114214-Unit-Circle-Trigonometry-Quick-QuestionUnit Circle Trigonometry
https://www.freemathhelp.com/forum/threads/114209-Unit-Circle-Trigonometry?goto=newpost
Sun, 20 Jan 2019 04:17:58 GMTLet sin 20◦ = k. Express the following in terms of k.

a) sin 340
b) cos 200
c) tan 160
d) cot 70

Been trying to solve this for a while, I have a math test tomorrow...
]]>Geometry and TrigWahamukahttps://www.freemathhelp.com/forum/threads/114209-Unit-Circle-TrigonometryDistance and Midpoint help
https://www.freemathhelp.com/forum/threads/114193-Distance-and-Midpoint-help?goto=newpost
Fri, 18 Jan 2019 16:41:16 GMTI do not know if this would be in geometry but I thought I would post it here. I really need help with this work worksheet because If I don't get it done I won't get credits for my class and my teacher can't help me right now.

]]>Geometry and Trigdukjos21https://www.freemathhelp.com/forum/threads/114193-Distance-and-Midpoint-helpHelp me to prove this Trigonometric problem
https://www.freemathhelp.com/forum/threads/114184-Help-me-to-prove-this-Trigonometric-problem?goto=newpost
Thu, 17 Jan 2019 17:58:42 GMTprove the identity cosx-2cos3x+cos5x=2sinx(sin2x-sin4x)prove the identity cosx-2cos3x+cos5x=2sinx(sin2x-sin4x)
]]>Geometry and Trigshoaib_099https://www.freemathhelp.com/forum/threads/114184-Help-me-to-prove-this-Trigonometric-problemThis question makes zero sense
https://www.freemathhelp.com/forum/threads/114169-This-question-makes-zero-sense?goto=newpost
Tue, 15 Jan 2019 19:15:40 GMT"The flask shown is constructed from a glass sphere and cylinder. Neglecting the Thickness of the glass and assuming no loss of volume from joining the two, what is the volume of the flask, to the nearest cm^3"

My work is shown in the picture.

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]]>Geometry and TrigNeedhelp4mathhttps://www.freemathhelp.com/forum/threads/114169-This-question-makes-zero-sensetrig equation solution help
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Tue, 15 Jan 2019 12:48:43 GMTcan someone please assist with

[1+cosx]/sinx] + [sinx]/[1+cosx] = 4

given answer is sinx = 1/2 and i cannot get this... tk u

]]>Geometry and Trigjislonicahttps://www.freemathhelp.com/forum/threads/114164-trig-equation-solution-helpGiven base area of 50?
https://www.freemathhelp.com/forum/threads/114162-Given-base-area-of-50?goto=newpost
Tue, 15 Jan 2019 04:06:55 GMTWhat does this question mean by given base area of 50cm when it is asking me to find the surface area?
I really don't know how to start.

The height is 12cm
The answer 439cm^2

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]]>Geometry and TrigNeedhelp4mathhttps://www.freemathhelp.com/forum/threads/114162-Given-base-area-of-50<![CDATA[I don't really get this question at all]]>
https://www.freemathhelp.com/forum/threads/114161-I-don-t-really-get-this-question-at-all?goto=newpost
Tue, 15 Jan 2019 02:25:54 GMT"The Diagram Shows a cylinderal water tank of diameter 4.2m and height of 2.5m. The curved surface and the top of the tank need to be painted. If one liter of paint covers 8m^2 and paint sold is in 2 liter cans, how many cans of paint are needed to paint the tank?"

What does this question mean by "curved surface and the top of the tank need to be painted" isn't the surface on top?

And what does it mean by covering 8m^2 and being sold in 2 liter cans.

Covering what?

And please don't ask for my work, i don't even know how to start this question.

Thanks.

]]>Geometry and TrigNeedhelp4mathhttps://www.freemathhelp.com/forum/threads/114161-I-don-t-really-get-this-question-at-allA cone has a surface area of 1188 cm^2, and a radius of 8.5 cm. Find the height of th
https://www.freemathhelp.com/forum/threads/114159-A-cone-has-a-surface-area-of-1188-cm-2-and-a-radius-of-8-5-cm-Find-the-height-of-th?goto=newpost
Mon, 14 Jan 2019 22:17:27 GMTTitle
Image: https://uploads.tapatalk-cdn.com/20190114/baa508c0ba9a4d5a52a2bdfab64572a0.jpg
Sent from my LG-H831 using TapatalkTitle

Sent from my LG-H831 using Tapatalk
]]>Geometry and TrigNeedhelp4mathhttps://www.freemathhelp.com/forum/threads/114159-A-cone-has-a-surface-area-of-1188-cm-2-and-a-radius-of-8-5-cm-Find-the-height-of-thWhat is the slant height of this cone?
https://www.freemathhelp.com/forum/threads/114158-What-is-the-slant-height-of-this-cone?goto=newpost
Mon, 14 Jan 2019 22:12:59 GMTWhat is the slant height of this cone, if its lateral surface area is 540ft^2 and it's radius is 12ft?

Answer is 14.3

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]]>Geometry and TrigNeedhelp4mathhttps://www.freemathhelp.com/forum/threads/114158-What-is-the-slant-height-of-this-coneTwo Column Proof Problem
https://www.freemathhelp.com/forum/threads/114152-Two-Column-Proof-Problem?goto=newpost
Sun, 13 Jan 2019 23:04:53 GMTAttachment 10885 (https://www.freemathhelp.com/forum/attachment.php?attachmentid=10885)
Any help on this problem would be appreciated. Thank you!Screenshot 2019-01-13 at 5.52.41 PM.png

Any help on this problem would be appreciated. Thank you!

]]>Geometry and Trigsolar401https://www.freemathhelp.com/forum/threads/114152-Two-Column-Proof-ProblemWhat is the surface area of this shape?
https://www.freemathhelp.com/forum/threads/114153-What-is-the-surface-area-of-this-shape?goto=newpost
Sun, 13 Jan 2019 22:43:25 GMTA solid is constructed from a cylinder and two hemispheres with dimensions as shown. Find the Surface area
Answer is 1608
but im getting...A solid is constructed from a cylinder and two hemispheres with dimensions as shown. Find the Surface area
Answer is 1608
but im getting 2111.150263
Im honest done with math, i have a unit test tomorrow and at this rate im probably gonna skip it. All these questions add extra steps the teacher never goes over

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]]>Geometry and TrigNeedhelp4mathhttps://www.freemathhelp.com/forum/threads/114153-What-is-the-surface-area-of-this-shape