Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
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19) 300-ft lighthouse trig: 2 boats, 18* and 62* angles of depression; find dist betw
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1
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937
Dr.Peterson
Dr.Peterson
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Help me make a diagram for a ladder leaning against a building
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5
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2K
Steven G
Steven G
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Find the height of the triangular stack of 8-ft-diameter pipes
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4
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2K
happiness
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H
12: solve triangle w/ base 14, angle 32*; 14: solve isosceles rt triangle w/ hyp 16
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8
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2K
happiness
H
H
15) Rt triangle ANT inscr in circle, chord NT=18, m(TAN)=35*; find shaded area
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1
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826
happiness
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H
Given GE=x, ET=4x, EA=16, find perimeter, area of triangle AGT
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9
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3K
Dr.Peterson
Dr.Peterson
H
10: rt triangle AYM, altitude YR to base AM, AM=45, YM=12; find RM
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3
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1K
Dr.Peterson
Dr.Peterson
C
why is this nontrivial? find cubic poly w/ roots cos{2pi/7}, cos{4pi/7}, cos{6pi/7}
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1
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2K
Dr.Peterson
Dr.Peterson
H
Given trapezoid w/ top length 25, side length 18, base angle 60*, find area, perim.
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3
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1K
Dr.Peterson
Dr.Peterson
P
If cosθ=725 and θ is between 0 and π2, what is the value of sinθ?
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3
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1K
pf1996
P
H
Given BE=BD, AE=CD, prove that triangle ABC is isosceles
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4
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3K
Steven G
Steven G
W
Equal trapazoids around the circumference of a circle
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2
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957
Dr.Peterson
Dr.Peterson
H
Find perimeter and area: right triangle w/ 2 legs equal; hypot. is 62
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2
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1K
happiness
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S
Cylinder volume and compression problem: helium cylinder with dimensions 51.5" H x 9D
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3
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2K
Shawn L
S
T
Find x, y, ratios of perimeter and area of two similar polygons
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2
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1K
Steven G
Steven G
S
scale factors and similarity: DA=72, AE=36, EB=24, area ABC=1950; find area of ABC
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5
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1K
Dr.Peterson
Dr.Peterson
B
Volume of sphere, after a hole has been drilled.
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12
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5K
yma16
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H
any ideas? sin[arccos(-sqrt[3]/2) + arctan(-sqrt[3]/3)] (easy angles)
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2
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2K
Dr.Peterson
Dr.Peterson
R
Can this triangle be solved? 1 angle, 1side, and the sum of the other two sides known
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3
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1K
JeffM
J
P
Find common hypotenuse for 2 triangles: boiled down to Y/sin(x) = Z/sin(A-x)
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3
Views
1K
HallsofIvy
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