The video tutorial, presented by Eka Wahyu Jatmiko, covers the concept of angles, starting with a basic definition and moving on to different types of angles such as full circle (360°), half circle (180°), right angle (90°), acute, and obtuse angles. It then explores how angles are formed by the hands of a clock, explaining the calculation of angles between different clock numbers. The tutorial provides examples to illustrate these calculations, helping viewers understand how to determine angles based on time. The video concludes with a recap of the key angle concepts discussed.

What is an angle formed by two intersecting lines called?

• A vertex

• An angle

• A circle

• A point

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CCSS.4.MD.C.5B

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Which angle is formed by a full circle?

• 45°

• 90°

• 180°

• 360°

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What is the measure of a right angle?

• 45°

• 90°

• 180°

• 360°

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An angle less than 90° is known as?

• Full angle

• Acute angle

• Right angle

• Obtuse angle

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CCSS.4.MD.C.5B

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How many degrees are there in a half circle?

• 360°

• 180°

• 90°

• 270°

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CCSS.4.MD.C.5B

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How many degrees are between each hour mark on a clock?

• 60°

• 15°

• 45°

• 30°

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CCSS.4.MD.C.5B

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What angle is formed by the clock hands at 3:00?

• 360°

• 270°

• 180°

• 90°

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CCSS.4.MD.C.5B

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At what time do the clock hands form a 180° angle?

• 3:00

• 6:00

• 9:00

• 12:00

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CCSS.4.MD.C.5B

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What angle is formed by the clock hands at 9:00?

• 360°

• 270°

• 180°

• 90°

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CCSS.4.MD.C.5B

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What is the angle between the clock hands at 12:30?

• 0°

• 360°

• 90°

• 180°

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CCSS.4.MD.C.5B

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