Geometry

​Lesson 1

​In this lesson you will learn how to identify and draw points, lines, line segments, rays, angles, and so much more!

Multiple Choice

What will you learn in this lesson?

• How to identify shapes

• How to draw

• How to draw points, lines, line segments, rays, and angles

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A point is an exact location in space.

​POINT

Draw

Draw 2 points: A and B

A line is a collection of points that continues forever in both directions.

​LINES

Draw

Connect A to B to create a Line.

A line segment is a line with two endpoints.

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​Line Segment

Draw

Draw a Line Segment

A ray starts from one point and extends forever.

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RAY

Draw

Draw a Ray

An angle is formed when 2 rays share an endpoint.

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ANGLE

Hotspot

Tap the 5 Angles in the image.

​Parallel lines are straight lines that do not intersect at any point.

Parallel Lines

Draw

Draw 2 parallel lines

​When two or more lines cross each other

INTERSECTING LINES

Draw

Draw 2 intersecting lines

Perpendicular lines are two lines that meet or intersect each other at right angles ( 90 ∘ ) .

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Parallel Lines

Draw

Draw a perpendicular line

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A right angle is an angle of 90°, as in a corner of a square or at the intersection of two perpendicular straight lines.

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RIGHT ANGLE

An acute angle is an angle that is less than 90°.

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Acute Angle

​Right Angle VS Acute Angle

An angle that is equal to 180 degrees.

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STRAIGHT ANGLE

Any angle greater than 90°.

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Obtuse Angle

90° angle.

​​Right Angle

​Any angle LESS than 90°.

​​Acute Angle

​Any angle greater than 90°

​​Obtuse Angle

​An angle that is equal to 180°.

​​Straight Angle

A line segment is a line with two endpoints.

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​Line Segment