Lesson · Grade 2 · Mathematics
The Flat Faces of a Cube and a Cylinder
- Grade 2
- Mathematics
- 1 min 3 s
- British Columbia
- BC2-MA-19
A pencil traces each flat face of a cube and a cylinder, and each traced face is laid flat on a tray and counted one at a time. The cube turns around to show all 6 of its faces, each one a square, and the cylinder turns over to show its 2 flat faces, both circles, with its curved side shown as not a flat face.
Concept: The flat faces of 3D objects
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In one sentence
The question this lesson answers
Here is a cube and a cylinder.
Each flat surface is called a face.
Transcript
What the lesson says
Here is a cube and a cylinder.
Each flat surface is called a face.
What shape is each flat face?
Trace around the front face of the cube.
The traced shape is a square.
Count the faces we can see: one, two, three.
Turn it around: four, five, six.
A cube has 6 faces. All are squares.
Now trace the flat top of the cylinder.
This flat face is a circle.
Turn it over: the bottom is a circle too.
The curved side is not a flat face.
A cube has 6 square faces. A cylinder's 2 flat faces are circles.
Curriculum
Where this fits
- British Columbia, Grade 2
Mathematics, Geometry and measurement: multiple attributes of 2D shapes and 3D objectsBC2-MA-19
The outcomes and strands follow the British Columbia curriculum.
Keep going
1 min 12 s3:15 p.m. or 15:15? Morning, afternoon and the 24-hour clock
Grade 4 · 1 min 12 s
1 min 26 s3D Objects: Faces, Edges and Vertices
Grade 3 · 1 min 26 s
1 min 21 sArea and Perimeter: What Is the Difference?
Grade 5 · 1 min 21 s
1 min 5 sArea of a Circle from the Radius or the Diameter
Grade 7 · 1 min 5 s
1 min 14 sArea of a Parallelogram: Cut and Slide into a Rectangle
Grade 6 · 1 min 14 s
1 min 18 sArea of a Rectangle: Count the Squares, Then Multiply
Grade 5 · 1 min 18 s
1 min 16 sArea of a Trapezoid: Two Copies Make a Parallelogram
Grade 6 · 1 min 16 s
1 min 19 sArea of a Triangle: Half of a Parallelogram
Grade 6 · 1 min 19 s
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