Polygon Terms:
What letter does a right angle make?
A right angle makes a "L"
What does the prefix -tri mean? What is this shape called, and how many sides does it have?
The prefix -tri means 3. The shape is called a triangle. It has 3 sides
If I had a triangle, a right triangle, a square, and a rectangle, how could you sort these shapes into two categories?
Category 1: Three sided shapes (right triangle, triangle)
Category 2: Four sided shapes (square, rectangle)
What are the names of the three transformations that we learned about?
Translation, rotation, reflection
If someone told you the time was quarter past 3, what time would it be?
3:15
What are vertices?
The point where two or more line segments, or edges, meet
We learned about three different names for a four-sided shape. What are they?
Rectangle, square, and quadrilateral
If I had a triangle, a quadrilateral, a hexagon, a pentagon, and an octagon, what is a sorting rule for these shapes?
Answers may vary:
For example, you could sort them by
Category 1: 4 or less sides (quadrilateral, and triangle)
Category 2: More than 4 sides (hexagon, pentagon, and octagon)
You see two triangles labeled A and B. You see that triangle B has moved two left, and one down. Triangle B is exactly the same way as triangle A, but just in a different location.
Is this a translation, reflection, or rotation?
It would be a translation of two left and one down (From triangle A to triangle B)
Show a math strategy for solving 6x7
Answers may vary:
What are the three properties used to describe polygons?
1. The sides must be straight
2. The shape must be flat (2D)
3. The shape must be enclosed
What is the name of a five-sided shape? Draw one on your whiteboard.
A pentagon
Compare a hexagon with a square:
1. How many vertices do both shapes have?
2. How many right angles (if any) do these shapes have?
3. How many sides do these shapes have?
A hexagon has 6 vertices, and a square has 4 vertices
A hexagon has no right angles, but a square has 4 right angles
A hexagon has 6 sides, but a square has 4 sides
Two triangles are shown to you. Triangle A is on one side of a line, and Triangle B is on the other side of the line. Triangle B looks flipped.
What transformation is this?
This is an example of a reflection. We know this because there is a line, and this is the line of reflection. We also know this because triangle B is flipped
Show a solution for solving 49รท7=?
Answers will vary
What are parallel lines?
Two lines that run alongside each other and they would never cross if they carried on
What is the name of an eight-sided shape? Draw an example on your whiteboard
An octagon
How many parallel lines do a pentagon and rectangle have?
Trick question!
A rectangle has two sets of parallel lines, where there are no parallel lines in a pentagon
There are two arrows. Arrow A is pointing to the right, but arrow B is turned 180 degrees. What transformation is this?
This would be a rotation
Give an example of a real life fraction in our classroom. Explain your reasoning
Answers will vary
What are perpendicular lines?
Two lines that meet at a right angle
What is the difference between a regular polygon and an irregular polygon?
A regular polygon has equal angles and equal sides. An irregular polygon has unequal angles and unequal sides
Draw a nonagon on your whiteboards. Answer the following:
1. Identify how many sides it has
2. Label its vertices
3. Find any parallel lines
Answer will be checked through teacher observation:
A nonagon has nine sides and nine vertices.
Using your whiteboards, draw an example of a translation, a rotation, and a reflection
Teacher will check answers
Subtract:
976-487=
489