04-11-2014, 02:25 PM

Dear All,

to get a feeling of how the Geometry App works, I tried to solve a simple problem, which is to calculate the heights of a tower by measuring the angle from a known distance. I know that distance*tan(angle) is the sought after value. But it would be more fun to do it with the Geometry App. Angle measure is DEG. Let distance = 50m and angle = 68°. For easier handling divide distance by 10. So in SYMB mode I entered:

GA:=DrawSlp(0,0,2.47509) Rem: 2.47509 = tan(68) to convert the measured angle to slope

GB:=line(point(5,0),Point(5,10))

GC:=inter(GA,GB)

GD:=triangle(point(0,0),point(5,0),GC)

GE:=angleat(GA,GB,GC,point(3,6))

The result is "aA=0.384" but I would expect "aA=68".

What am I doing wrong? I used the Prime Emulator software for this with version 2013 11 25 (5447).

Thank you very much in advance.

Best regards

Karl

to get a feeling of how the Geometry App works, I tried to solve a simple problem, which is to calculate the heights of a tower by measuring the angle from a known distance. I know that distance*tan(angle) is the sought after value. But it would be more fun to do it with the Geometry App. Angle measure is DEG. Let distance = 50m and angle = 68°. For easier handling divide distance by 10. So in SYMB mode I entered:

GA:=DrawSlp(0,0,2.47509) Rem: 2.47509 = tan(68) to convert the measured angle to slope

GB:=line(point(5,0),Point(5,10))

GC:=inter(GA,GB)

GD:=triangle(point(0,0),point(5,0),GC)

GE:=angleat(GA,GB,GC,point(3,6))

The result is "aA=0.384" but I would expect "aA=68".

What am I doing wrong? I used the Prime Emulator software for this with version 2013 11 25 (5447).

Thank you very much in advance.

Best regards

Karl