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
4 Scotland: Compulsory education starts at age five, although many children start at four because schools have a single intake at the beginning of the school year. Local authorities set a cut-off date (normally 1 March) defining the cohort of children eligible to start school at the beginning of the following school year (normally in August).