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
It is often said that a child will be fluent at French after a couple of months in a French school. More often, after 2-3 months the child can speak French plausibly, but it needs 6-12 months of immersion to be considered fluent, sometimes longer. This process is longer and harder for children over about 10 years old.