12.3 Other Constructions

 

 construction of parallel lines and the relationship between this and a rhombus 

 

 

 

 

 

 

 

 

 

 

 

 look at Figure and paper folding

 

 

ANGLE BISECTORS

 

 

 

 construction of an angle bisector

 

 

 

 

 

 

 

 

 

 

 

 

 look at Figure —paper folding

 

 

PERPENDICULAR LINES

 

 construction of perpendicular lines

 

 

 

 

 

 look at Figures

 

 

ALTITUDE OF A TRIANGLE

 

 

 construction of an altitude (of a triangle) in two ways

a)      with a compass—

 

i)                    acute

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ii)                  obtuse

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

b)      MIRA