MathematicsBeginner

Measuring and classifying angles

Centre the protractor on the vertex

Estimated time · 9 min 10 Content blocks

Core concepts

Formulas

\text{平角}=180^\circ,\qquad \text{周角}=360^\circ,\qquad 1\text{ 周角}=2\text{ 平角}=4\text{ 直角}

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Exercises

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Glossary

Degree
Straight angle
Full angle

Prerequisites

Angles and their types8 min

Practice set

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