IGCSE: ch25 – Angle Properties (Ext.) - S Topic 4. Geometry IGCSE: ch25 – Angle Properties (Ext.) - S 1 2 S19p21#8 S19p21#8 S19p23#19 S19p23#19 1 1 3 S19p23#25a S19p23#25a 4 s19p42#2 s19p42#2 22 s19p42#7a s19p42#7a 5 s19p42#7a s18p21#5 s18p21#5 s18p21#5 6 3 3 3 7 8 s18p23#20 s18p41#8 W19p12#14 4 9 s19p11#19 S20p22#1 S20p22#1 10 s19p23#13a s19p23#13a 11 M18p22#5 44 5 12 S18p23#25 3