Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
L
Is this angle less than or equal to another angle
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6
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1K
lookagain
L
M
Struggling with word problem: "ABC is a right-angled triangle at A..."
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6
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2K
Bruce
B
A
Some Trig Identities: Prove cos(4t) = 8cos^4(t) - 8cos^2(t) + 1, etc.
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14
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2K
lookagain
L
B
Year 7 Geometry: Find the value of angle x in drawing
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5
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1K
lev888
lev888
T
Finding a vector perpendicular to the plane 2x + y - z = 7 (answer is -4i - 2j + 2k)
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4
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1K
Dr.Peterson
Dr.Peterson
J
Question 15. Flagpole: A 30m cable is connected to the top of a flag pole....
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11
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2K
Steven G
Steven G
E
Find the angle of a slot on a cylinder
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4
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1K
Dr.Peterson
Dr.Peterson
A
Triangles and circumference: "Given a circle with center O and radius r, draw a chord AB...."
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3
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1K
khansaheb
K
M
Verifying if the 3 incidence axioms are true in a given incidence plane candidate
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7
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2K
mathinker
M
shahar
Dividing a quadrilateral: Can every quadrilateral be divided to 2 triangles?
2
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23
Views
5K
Steven G
Steven G
K
"The diagram shows the roof of a building. The base ABCD is..."
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4
Views
3K
The Highlander
The Highlander
N
Identify angles: Count the number of obtuse, acuse, reflex, and right angles in drawing
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6
Views
2K
The Highlander
The Highlander
V
The vertical asymptote of a trig function: which is *not* an asymptote of 1/sinpix?
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5
Views
1K
Dr.Peterson
Dr.Peterson
R
Area of unknown triangle: if I ALWAYS know the length of x, y and T, how do I calculate the areas of a1 and a2?
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17
Views
3K
Dr.Peterson
Dr.Peterson
F
Help with definitions: I keep confusing where the zero value lies for the apsis compared to where it lies for the ordnance.
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1
Views
770
stapel
stapel
A
Trigonometry in reverse kinematic of five bar robot: don't understand resolution of system
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1
Views
995
blamocur
blamocur
C
What type of quadrilateral is this? (not "trapezium". maybe "trapezoid"...? or just "irregular"?)
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16
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3K
khansaheb
K
D
high school co-ordinate geometry with a quadrilateral and two kites
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14
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3K
The Highlander
The Highlander
T
Reuleaux triangle confusion (I'm trying to measure a tabletop insert to replace the glass that broke.)
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4
Views
1K
titanium
T
E
Damped Sinusoidal Wave (need to fit a function to the data points)
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3
Views
1K
khansaheb
K
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