Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
S
Finding a line that is perpendicular to the z-axis and passes through a set of points that form a plane
Replies
6
Views
1K
Dr.Peterson
Dr.Peterson
M
Find smallest area of rectangle based on lines inside.
Replies
9
Views
2K
Dr.Peterson
Dr.Peterson
L
Please solve: regular pentagon ABCDE; FE, EG, GH sides of regular n-gon; AB horizontal, EG vertical; m(<DEF)=69degrees
Replies
16
Views
4K
Laia
L
J
Geometry problem: find the values of AD , AB , AE and AC
Replies
4
Views
6K
math_parent
M
J
Lean of Tree: from the posted picture, how many degrees is this tree leaning?
Replies
2
Views
1K
Jsue
J
R
The pendulum of a grandfather clock consists of a circular disc of radius 5cm attached to a straight length 45cm.
Replies
2
Views
835
The Highlander
The Highlander
M
Urgent Help Please: "The math club designed a pennant for the school team, in the shape of an isosceles triangle."
Replies
3
Views
2K
The Highlander
The Highlander
M
finding r3 in terms of r1 and r2: circles, C1 and C2, C1 larger than C2; C1 tangent to C2, y-axis, and x-axis; C2 tangent to C1 and x-axis
Replies
19
Views
5K
mario99
M
T
Maximize an angle by finding a point's coordinates
Replies
2
Views
779
Dr.Peterson
Dr.Peterson
A
Show that the angles ACB and DCF are equal
Replies
0
Views
966
anonym4=
A
B
Finding the length of a curved line between two points
Replies
9
Views
3K
blamocur
blamocur
A
Follow-up to: About how many m^2 of steel will Marcel need to build the pool?
Replies
1
Views
764
stapel
stapel
S
I need your help: If AT+BT' = m√n-p√q, m,n,p,q natural, n^2, q^2 coprime, find mn-pq.
Replies
10
Views
2K
Seyed
S
I
Sinus: Construction of Triangle (Triangles in books are sometimes only indicated with 2 lines....)
Replies
4
Views
1K
I'mLearning
I
M
Finding Segments and Angles: Given AE, BDG, angle F, angle G are right angles; D is midpoint of EC, B is midpoint of...
Replies
2
Views
820
Dr.Peterson
Dr.Peterson
I
Distance between 2 vectors: If I want to define (and later measure) this, how is that commonly done?
Replies
2
Views
723
khansaheb
K
L
My proof on 5 color map
Replies
6
Views
1K
blamocur
blamocur
bob thompson
Mathematical Prison Escape: Create challenge where prisoner has to use geo/trig to escape
2
Replies
25
Views
5K
bob thompson
bob thompson
J
The packing problem: What is the methodology for finding how many small spheres (radius r) can fit in a large sphere (radius R)?
Replies
1
Views
2K
Dr.Peterson
Dr.Peterson
rocketFrog
Need help with a triangle similarity problem: Triangle CBD is inscribed in a circle. From point D, a tangent line is drawn...
Replies
1
Views
787
Dr.Peterson
Dr.Peterson
You must log in or register to post here.
Top