SaiBook.us Geometry

Lesson

Title: Angles

Grade: 6-a Lesson: S2-L3

Explanation: Hello students, let us learn a new topic in geometry today with definitions, concepts, examples, and worksheets included.

Lesson:

Definition: Angles

When two lines intersect at a point, they form an angle.

An angle is the measure of the opening formed between these two rays and is represented by the symbol ∠.

Angles are typically measured in degrees and radians, which are units of measurement for circularity or rotation.

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Explanation: An acute angle measures less than 90° at the vertex.

An obtuse angle is between 90° and 180°.

A right angle precisely measures 90° at the vertex.

An angle measuring exactly 180° is a straight angle.

A reflex angle measures between 180°- 360°.

A complete angle measure equals 360°.