Of course, the main property of isosceles triangles is their two congruent sides. All isosceles triangles also have base angles that are congruent. Again, this property holds true for all isosceles triangles, no matter which direction their apex points.
In France, children start school at three years old (although it is not compulsory until six years old). A comparison between my daughter (educated in France) and her cousin (in the UK) at exactly 4 yrs 9 1/2 months old showed that a British education gives kids the tools they need to read and write much more quickly. Sarah, Apt, France
Children in the Netherlands must be at least four years old to enter primary education. Almost all 4-year-olds (99.3%) in the Netherlands indeed attend primary school, although this is not compulsory until children reach the age of 5. Primary school is free of charge. In most schools, children are grouped by age in mixed ability classes, with one teacher for all subjects. Primary school consists of 8 groups (thus 8 years of schooling).