The term “attribute” in the context of math means the traits or the properties of a shape or an object. For example, observe the following picture of books.
In the above image, the traits of the books can be listed as:
Shape – Rectangle
Color – Red and Blue
Page count
Length & Breadth in a given unit
Weight
The attributes of a geometric shape define the characteristics of that shape visually and mathematically. For example, consider a “square” as shown below. The attributes of a square are:
Visual Attributes 
Mathematical Attributes 


Similarly, based on the attributes, we can determine the type of triangle:



The elementary math skills in children initiate with visual observation before understanding numbers and comprehending them. Understanding the attributes of geometric figures, math expressions (such as symbols and operators) and translating them in the form of numbers is the key step achieved with finding “attributes”.
Fun Facts

Properties of geometric shapes
Quadrilaterals
Coordinates