Introduction to Geometry

What is Geometry the study of?

• Numbers and equations

• History and geography

• Planets and stars

• Lines, shapes, angles, distances

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CCSS.4.G.A.1

CCSS.4.G.A.2

CCSS.4.MD.C.5

What are the three most basic elements of Geometry mentioned?

• Alphabets, numbers, symbols

• Points, lines, planes

• Addition, subtraction, multiplication

• Circles, squares, triangles

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CCSS.4.G.A.1

CCSS.4.G.A.2

What does a point help us describe in Geometry?

• The weight of objects

• The volume of shapes

• Specific locations in space

• The length of a line

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CCSS.4.G.A.1

What is the difference between a line and a line-segment?

• A line-segment has a beginning and an end, a line goes on forever

• A line is always straight, a line-segment can be curved

• A line-segment is longer than a line

• There is no difference

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CCSS.4.G.A.1

CCSS.4.G.A.2

What is a 'ray' in Geometry?

• A line with a beginning point but no ending point

• A point that moves

• A line that curves

• A line-segment that is very short

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CCSS.4.G.A.1

How can you represent a line-segment in shorthand notation?

• With a circle around the letters

• With a line over the top of the letters

• With a square around the letters

• With a triangle over the letters

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CCSS.4.G.A.1

What is a plane in Geometry?

• A three-dimensional object

• A point in space

• A type of aircraft

• A two-dimensional object

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CCSS.HSG.CO.A.1

How many points do you need to define a plane?

• Two

• Three

• Four

• One

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CCSS.HSG.CO.A.1

What does a triangle represent in the context of planes?

• A point in space

• A type of line

• A smaller part or a segment of a plane

• A three-dimensional object

What is the third dimension mentioned that allows movement in a 3D space?

• Up and down

• In and out

• Forward and backward

• Left to right

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CCSS.5.G.A.1