1 Without proper scans of teeth, there is a danger of permanent nerve damage. 2  Carol Russell, 46, from Birmingham, can't even kiss her children. 3  Her wisdom tooth was removed in 2008 but several operations couldn't stop the pain.  Wisdom tooth extraction is one of the most common procedures in the UK.
An isosceles triangle is a triangle with two congruent sides and congruent base angles. congruent means equal. No matter which direction the triangle's apex, or peak, points, it's an isosceles triangle if two of its sides are congruent. Note the hash marks that indicate congruency. Any sides or angles with the same number of hashes through them are congruent.
A triangle with all sides equal is called an equilateral triangle, and a triangle with no sides equal is called a scalene triangle. An equilateral triangle is therefore a special case of an isosceles triangle having not just two, but all three sides and angles equal. Another special case of an isosceles triangle is the isosceles right triangle. The height of the isosceles triangle illustrated above can be found from the Pythagorean theorem as.