Answer:
A square is a rectangle.
Step-by-step explanation:
A square is a quadrilateral with all four angles right angles and all four sides of the same length. So a square is a special kind of rectangle, it is one where all the sides have the same length. Which means, every square is a rectangle because it is a quadrilateral with all four angles right angles.
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It would be 40.
60 minus 20 = 40
Difference means subtraction
Thx from the website http://goodcalculators.com/ratio-calculator/
You can make 3 tens blocks and then 3 tens blocks but only two should be filled than for the third one fill 7 only