Celia writes the addition problems shown. she says she can tell which sum will be greater without adding how does she know

How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

What is the sum of these mixed numbers 4 2/3+ 3 1/9