Free Printable WorksheetMathGrade 3Math Curriculum2.G.A.1 (foundation)

3.122 Triangles by Sides and Angles Worksheet

Download our free printable Grade 3 Math worksheet on 3.122 Triangles by Sides and Angles. Ideal for classroom practice, homeschool learning, independent homework, and standardized test preparation. Available in both print-ready PDF and editable DOCX formats.

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 3 Math worksheet provides structured practice on 3.122 Triangles by Sides and Angles. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Select the triangle that matches given side or angle attributes or choose how to classify a shown triangle. (CCSS 2.G.A.1 (foundation); extension)

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Grade 3

Subject

Math

Domain

Math Curriculum

Formats

PDF & DOCX

Sample Practice Problems

Preview the types of problems and questions covered in this worksheet

Below are sample questions representative of the exercises included on this worksheet and related 3.122 Triangles by Sides and Angles skill assessments:

Problem 1Difficulty: Mastery
A final sort has a triangle with no equal sides and one square corner. Which bins should it go into?
Ascalene and right
Bequilateral and acute
Cisosceles and obtuse
Dequilateral and right
Solution & Explanation:No equal sides means scalene. One square corner means right.
Problem 2Difficulty: Mastery
If a triangle is equilateral, its side classification is based on side lengths, not angle sizes.
ATrue
BFalse
Solution & Explanation:Equilateral is a side classification because it tells that all three side lengths are equal.
Problem 3Difficulty: Mastery
Which angle card is mislabeled? Card 1: all angles smaller than a right angle labeled acute. Card 2: one square corner labeled obtuse. Card 3: one angle wider than a right angle labeled obtuse. Card 4: no right or obtuse angles labeled acute.
ACard 1
BCard 2
CCard 3
DCard 4
Solution & Explanation:A square corner is a right angle, so Card 2 should be labeled right, not obtuse.

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Frequently Asked Questions

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QHow do I download and print this 3.122 Triangles by Sides and Angles worksheet?

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QIs this 3.122 Triangles by Sides and Angles worksheet free for teachers and homeschoolers?

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QCan students practice 3.122 Triangles by Sides and Angles online with instant feedback?

Yes! In addition to this printable worksheet, students can practice 3.122 Triangles by Sides and Angles interactively on our platform with automated grading, instant score tracking, and detailed step-by-step solutions.

QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Grade 3 Math students. It aligns with educational standard 2.G.A.1 (foundation) (Primary standard selected for prompt fields in this prompt cell: CCSS 2.G.A.1 (foundation). Skill statement in this prompt cell: Select the triangle that matches given side or angle attributes or choose how to classify a shown triangle. Associated standards listed with this skill in this prompt cell: CCSS 2.G.A.1 (foundation); extension. Use this prompt-provided wording as the supporting standard description for this workflow.).

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