Angle Measurement and Symmetry

Students determine unknown angle measurements in line-symmetric figures. Note: Activity 1 was updated in the Student Edition PDF and the Student Edition (Answers) PDF on 1/12/2026.

By Amplify Classroom

Grades: 4th Grade

Subject: Math

Learning goals: Today’s Goal • Determine unknown angle measurements using symmetry and the attributes of two-dimensional shapes. Materials Manipulative Kit: protractors, rulers; Classroom materials: scissors, tracing paper