GRADE 10 MATH · CHAPTER 2
Geometry & measurement
Study each lesson in order, or choose the idea you need today.
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- Choose a chapter
- Study a lesson
Geometry
Choose evidence for triangle congruence
Distinguish valid triangle-congruence conditions from insufficient evidence.
Geometry
Find a corresponding side in similar triangles
Use the constant scale factor between similar triangles to find a missing side.
Geometry
Find distance between coordinates
Use horizontal and vertical changes to find distance between two points.
Geometry
Use a right-triangle sine ratio
Find an exact sine ratio from labeled right-triangle side lengths.
AN EXAMPLE FROM THIS CHAPTER
All three pairs of corresponding sides have equal lengths.
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SSS
Three corresponding side equalities establish side-side-side congruence.
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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