Answer:

The given text appears to be a set of instructions for classifying triangles based on their sides. The purpose of the text is to instruct the reader to mark the box that matches the type of triangle shown in each case when classified by sides. The text describes three different types of triangles based on their sides: equilateral, isosceles, and scalene. It explains that an equilateral triangle has all sides of equal length, an isosceles triangle has two sides of equal length, and a scalene triangle has no sides of equal length. The text provides examples of triangles marked with lines to show when two sides are congruent or the same length. The reader is instructed to match each triangle to the appropriate box based on the length of its sides. The tone of the text is instructional, with no emotional language or persuasion, and it aims to provide clear guidance on how to classify triangles based on their sides.