Basic Geometry Grade 4

What is a line segment?

• A set of points that goes on forever in both directions

• A curved line that goes on in one direction forever

• A part of a line between two endpoints

Angle that measures 90 degrees

• acute
• straight
• right
• obtuse

Part of a line with two end points

• point
• line
• line segment
• ray

What is an angle?

• A straight set of two points that go on forever on each side
• A part of a line with end points on both sides
• Two rays with the same end point, forming a vertex

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What type of angle is this?

• Acute
• Obtuse
• Right
• Caboose

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What type of angle is this?

• Acute
• Obtuse
• Right
• Caboose

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What type of angle is this?

• Acute
• Obtuse
• Right
• Caboose

What does the image show?

• a line
• a line segment
• a ray
• a point

A straight angle is....

• 90⁰
• 60⁰
• 30⁰
• 180⁰

What does the image show?
(The whole thing, not just the points)

• a ray
• a line
• parallel lines
• line segment