GRADE 7 MATH · CHAPTER 4
Geometry & measurement
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Geometry & measurement
Complete a straight angle
Use the 180-degree sum of adjacent angles on a straight line.
Geometry & measurement
Find a circle’s exact circumference
Connect circumference, diameter and radius with C = πd = 2πr.
AN EXAMPLE FROM THIS CHAPTER
Adjacent angles form a line. One is 65°. What is the other?
Show answer & explanation
115
180 − 65 = 115 degrees.
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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