Math 361 ACTIVITY 8: Following Saccheri —eliminating the obtuse
... 1. (Background that you do not have to prove) Since a Saccheri quadrilateral is convex, the SASAS criterion for convex quadrilaterals shows that 2ABCD ∼ = 2BADC so 6 ADC ∼ = 6 BCD. [The summit angles of the Saccheri quadrilateral are congruent. Thus both are obtuse or both are acute or both are rig ...
... 1. (Background that you do not have to prove) Since a Saccheri quadrilateral is convex, the SASAS criterion for convex quadrilaterals shows that 2ABCD ∼ = 2BADC so 6 ADC ∼ = 6 BCD. [The summit angles of the Saccheri quadrilateral are congruent. Thus both are obtuse or both are acute or both are rig ...
