Geometry: Find the area of the triangle using the apothem and one side length. It is an equilateral triangle. The apothem is 4 square root 3 all over 3 and it created a right angle with the side it touches. The side length is 8. Can anybody explain how this works for other shapes too?

Astudent found the solution below for the given inequality. |x-9|< -4 x-9> 4 and x-9< -4 x> 13 and x< 5 which of the following explains whether the student is correct? -the student is completely correct because the student correctly wrote and solved the compound inequality. -the student is partially correct because only one part of the compound inequality is written correctly. -the student is partially correct because the student should have written the statements using “or” instead of “and.” -the student is completely incorrect because there is no solution to this inequality.