Explore the world of angles! Learn to identify, classify, measure, and calculate angles using a protractor and angle relationships.
Identify acute, right, obtuse, and straight angles
Measure angles accurately using a protractor
Find missing angle measures using relationships
Add angles that share a common side
Angles that measure less than 90 degrees. They look "sharp" or "small." Example: 45 degrees.
Angles that measure exactly 90 degrees. They form a perfect "L" shape or corner.
Angles that measure more than 90 degrees but less than 180 degrees. They look "wide."
Angles that measure exactly 180 degrees. They form a straight line.
Complete lesson plans and strategies
Introduction to angle concepts
30 problems across all skills
10 test-format questions
Home practice activities
Complete solutions with explanations
Print all materials for classroom use or send home with students.