Vlinderstrik
xrange -25,25 yrange -15,15 poly red,-20,10,-20,-10,10,5,10,-5 text black,-0.5,2.5,medium,O text black,-22,12,medium,A text black,-22,-10,medium,B text black,11,7,medium,C text black,11,-5,medium,D
[AB] // [CD] ; AB = $val8 cm ; CD = $val9 cm ; AO = $val10 cm . Hoe lang is [OD] (in cm) ?
Vlinderstrik II
xrange -25,25 yrange -15,15 poly blue,$val20,$val21,$val22,$val23,20,7,15,-5 line $val20,$val21,$val22,$val23,red line 20,7,15,-5,red text black,-0.5,3,medium,O text black,21,9,medium,G text black,16,-5,medium,H text black,$val24,$val25,medium,E text black,$val26,$val27,medium,F
[EF] // [GH] ; EF = $val28 cm ; GH = $val29 cm ; EO = $val30 cm. Hoe lang is [HO] (in cm) ?
Thales en omgeschreven cirkel
xrange -25,25 yrange -25,25 circle 0,0,220,red line -22,0,22,0,blue circle -11,0,110,red lines blue,-22,0,14,17,22,0 line 14,17,22,0,black line -4.5,8.8,0,0,black text black,-24,1,medium,E text black,15,19,medium,F text black,23,1,medium,G text black,-4,12,medium,H text black,1,3,medium,O
[HO] // [FG] ; FG = $val8 cm ; HO = $val9 cm ; EO = $val10 cm. Hoe lang is [EG] (in cm) ?
Driehoek en evenwijdige lijnen
xrange -20,20 yrange -20,20 triangle -5,12,-15,-10,16,-10,black line -15,-10,16,-10,red line -10,1,5.5,1,red text black,-5.5,14.5,medium,A text black,-17,-10,medium,B text black,17,-10,medium,C text black,-12,3,medium,D text black,6.5,3,medium,E
[DE] // [BC] ; AB = $val8 cm ; AD = $val9 cm ; BC = $val10 cm. Hoe lang is DE (in cm) ?
Thales en gelijkbenig driehoek
xrange -20,20 yrange -20,20 triangle 0,15,-12,-15,12,-15,black line -12,-15,12,-15,red line $val26,$val27,$val28,$val29,red text black,-0.5,17.5,medium,A text black,-13.5,-15,medium,B text black,12.5,-15,medium,C text black,$val30,$val31,medium,M text black,$val32,$val33,medium,N
[MN] // [BC] ; AB = $val34 cm ; AM = $val35 cm ; MN = $val36 cm. Hoe lang is [BC] (in cm) ?