Geometry and Trig

Ask your questions about all levels of geometry from elementary school through college.
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Find the angles of a skinny hexagon without algebra - simple math
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1
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814
Dr.Peterson
Dr.Peterson
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Problem 24: If P/Q = R/S, which of the following is NOT true?
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8
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3K
happiness
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Finding if vector line doesn't cross 3D plane v = (2i − 3j + k) + µ(i − 2j) + ν(i + k
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2
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1K
pkusy882
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Value of arcsin expression E = arcsin(|24,2506|) / 24 in degrees, radians
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2
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809
Dr.Peterson
Dr.Peterson
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Finding angle created by polygon within polygon
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3
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999
Dr.Peterson
Dr.Peterson
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Formula for angle in Polygon: size of angle ACD in terms of n
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10
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3K
Dr.Peterson
Dr.Peterson
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Transform data from 0 to 360° to -180 to 180° (surface aspect of a glacier)
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1
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635
Dr.Peterson
Dr.Peterson
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NY = 3*sqrt 6 OR 12? tri NYV, alt YA to NV, NA=6, AV=9; find NY
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6
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2K
stapel
stapel
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Finding number of sides of regular polygon with different interior angles?
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6
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2K
Simonsky
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9) Find perimeter, Area of triangle CRT (altitude TA to CR, TR=45, AR=27)
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5
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2K
happiness
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Correct similarity statement for triangles ACB (w/ altitude CD to AB), ACD, BCD
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1
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815
Dr.Peterson
Dr.Peterson
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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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964
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
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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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863
happiness
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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
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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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2K
Dr.Peterson
Dr.Peterson
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