<Dd> 2 a c a + c> t> a c 2 a + c (\ displaystyle (\ frac (2ac) (a + c))> t> (\ frac (ac (\ sqrt (2))) (a + c))) </Dd> <P> as well as </P> <Dl> <Dd> t <4 a 3 (\ displaystyle t <(\ frac (4a) (3))); </Dd> </Dl> <Dd> t <4 a 3 (\ displaystyle t <(\ frac (4a) (3))); </Dd>

If the measure of the vertex angle of an isosceles triangle is an integer