GRADE 3 MATH · CHAPTER 4
Geometry & measurement
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Geometry & measurement
Find rectangle perimeter
Add all four rectangle side lengths to find distance around it.
AN EXAMPLE FROM THIS CHAPTER
Convert 6 centimeters to millimeters.
Show answer & explanation
60
6 × 10 = 60 millimeters.
Curriculum & source notes
These are original Little Play study books organized around U.S. school topics. The official curriculum references below guide topic scope and progression. Coverage is selected, not a complete curriculum or a verified match to every state standard. They are not copies of a publisher’s textbook. Check your school’s syllabus and book edition.
High-school courses can be taken in different years. Choose the topic that matches the student’s current course.
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