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Sunshine447
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Can someone please help me "Inscribed circles to triangles"? I watched a video, but it still doesn't make sense..... The video skips a lot of the steps and I'm not sure why...... Please help me!
 2 years ago
 2 years ago
Sunshine447 Group Title
Can someone please help me "Inscribed circles to triangles"? I watched a video, but it still doesn't make sense..... The video skips a lot of the steps and I'm not sure why...... Please help me!
 2 years ago
 2 years ago

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CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
A circle inscribed in a triangle?
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
I guess so
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
Like this? dw:1349651230207:dw
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
@CliffSedge yeah, that's what the lesson shows
 2 years ago

MrMoose Group TitleBest ResponseYou've already chosen the best response.0
dw:1349651442977:dw
 2 years ago

MrMoose Group TitleBest ResponseYou've already chosen the best response.0
the center of the circle is equidistant from all of the sides
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
I guess I have to get perp bisectors to do it?
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
@MrMoose
 2 years ago

MrMoose Group TitleBest ResponseYou've already chosen the best response.0
to do what?
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
Not bisectors, but yes, you'll need perpendiculars.
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
to make the inscribed circle
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
im just reading the lesson and it says bisectors..... im so confused
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
If you want to make the circle, then you need the intersection of angle bisectors.
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
angle bisectors?
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
If I post an assignment can you help me with it specifically?
 2 years ago

MrMoose Group TitleBest ResponseYou've already chosen the best response.0
dw:1349651716141:dw
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
there are 7 parts, so ill post them one at a time
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
One: Construct a circle and a tangent to the circle using a compass and straightedge. (4 points) Draw three random points on your paper. Construct the circle through these three points. Determine the circle's center. Construct a tangent to the circle, using one of the original three points as the point of tangency.
 2 years ago

MrMoose Group TitleBest ResponseYou've already chosen the best response.0
What do you need help with?
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
Oh, you're doing the reverse. You're starting with the circle, then circumscribing a triangle around it.
 2 years ago

MrMoose Group TitleBest ResponseYou've already chosen the best response.0
I am unsure as to how I can help
 2 years ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
dw:1349651958633:dw
 2 years ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
I guess it's like that.
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
im not really sure, but ill do something like that for part one, thanks! now part 2...
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
Two: Construct a circumscribed circle about a regular polygon using a compass and straightedge. (4 points) Choose a regular polygon from which you will draw a circumscribed circle. triangle  square  pentagon  hexagon Construct the circumscribed circle.
 2 years ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
dw:1349652171056:dw
 2 years ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Like that I guess...
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
how is the circle made?
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
"Circumscribed circle" means the circle is on the outside of the polygon.
 2 years ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
It says a circle inside any of those polygons. I chose a square.
 2 years ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
@CliffSedge . Ahh yes. I get that mixes up a lot.
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.1
This seems pretty easy to follow for a circle in a triangle http://www.mathsisfun.com/geometry/constructtriangleinscribe.html notice the instructions below the "action figure"
 2 years ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
dw:1349652319786:dw
 2 years ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Like that then I suppose?
 2 years ago

CliffSedge Group TitleBest ResponseYou've already chosen the best response.0
The radius of the circle is the distance from a vertex of the polygon to the polygon's center.
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.1
For a circle through 3 points http://www.mathsisfun.com/geometry/constructcircle3pts.html
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
@phi do you have a link for circumscibing too? that helped sooo much
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.1
http://www.mathsisfun.com/geometry/constructtrianglecircum.html
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
thanks sooo much @phi can you help me with the next part too?
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
Three: Construct an inscribed circle within a regular polygon using a compass and straightedge. (4 points) Choose a regular polygon from which you will draw an inscribed circle. Note: The polygon you choose must be different from the polygon you chose in problem 2. triangle  square  pentagon  hexagon Construct the inscribed circle.
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.1
I would pick a square, and follow the same instructions as for the triangle. Bisect 2 angles and find the intersection to get the center of the circle. draw a perpendicular from the center to 1 side of the square to find the radius
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
Okay, how about Six: Explain, using complete sentences, how you can determine whether or not a circle may circumscribe a quadrilateral.
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.1
Here is the professional answer: A quadrilateral is cyclic (i.e. may be inscribed in a circle) if one side subtends congruent angles at the two opposite vertices.
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.1
How about opposite angles of a cyclic quadrilateral are supplementary (sum to 180º)
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
okay that makes much more sense lol thanks! Seven: Explain, using complete sentences, why an inscribed circle will only work within a regular polygon.
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
And, is there a video for this? Construct a circle and a tangent to the circle using a compass and straightedge. (4 points) Draw three random points on your paper. Construct the circle through these three points. Determine the circle's center. Construct a tangent to the circle, using one of the original three points as the point of tangency.
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.1
Construct a circle and a tangent to the circle using a compass and straightedge. draw the circle. draw a line from the center through the circle. mark the intersection. construct a perpendicular to the line through that point.
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.1
Draw three random points on your paper. Construct the circle through these three points. For a circle through 3 points http://www.mathsisfun.com/geometry/constructcircle3pts.html
 2 years ago

Sunshine447 Group TitleBest ResponseYou've already chosen the best response.0
thanks!
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.1
Determine the circle's center. I think you have to do this do construct the circle in the first place. Construct a tangent to the circle, using one of the original three points as the point of tangency. This is the same problem as the first one: Construct a circle and a tangent to the circle using a compass and straightedge.
 2 years ago
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