Informal to Formal Geometric Thinking

​Synonym: Shape

Fill in the Blank

Another word for polygon

Multiple Choice

Which vocab word is be defined below:

"A line segment joining two vertices of a polygon but is not a side of the polygon."

• Auxiliary Line

• Diagonal

• Polygon

• Line Segment

Multiple Choice

Which vocab word doesn't involve how a figure is drawn?

• Construct

• Sketch

• Conjecture

• Draw

Multiple Choice

To draw a figure is to create an exact figure without measurements, using paper folding, compass or a straightedge.

• True

• False

Match

Match the following terms to their definitions.

• 2 or more lines that go in the same direction and never intersect. ​

• A point on a line or line segment that divides it into two equal parts. 

• a straight set of points that extend in opposite directions forever. 

• 2 lines that intersect at a 90 degree angle (right angle).

Parallel lines

Midpoint

Line

Perpendicular Lines

• Parallel lines

• Midpoint

• Line

• Perpendicular Lines

Categorize

Options (4)

Compass

Straight Edge

Protractor

Ruler

Determine which tools are used for measuring either sides or angles of polygons.

Non-Measuring Tools

Measuring Tools

Multiple Select

Which 3 polygon categories will we be focused on this year?

• Hexagons

• Triangles

• Circles

• Octagons

• Quadrilaterals

Categorize

Options (12)

4 sides

4 angles

3 sides

3 angles

No sides

$$interior\ angles\ \equiv180\degree$$  

$$interior\ angles\equiv\ 360\degree$$  

$$4\ interior\ angles\ \equiv\ 360\degree$$  

Has a radius

Can contain all different side lengths

square

circumference

Organize these options into the right categories

Quadrilaterals

Triagles

Circles

​Marla says the figure that fits both categories is a rhombus

Flynn says the figure that fits both categories is a square

Which one is correct? Explain your answer.

​Partner Practice!

Independent Assignment & DOL Time !!!