Lesson · Grade 5 · Mathematics
Prisms and pyramids: name it by its base
- Grade 5
- Mathematics
- 1 min 16 s
- British Columbia
- BC5-MA-30
A triangular prism and a square pyramid are drawn side by side. The prism's 2 matching triangle bases and the pyramid's 1 square base light up to give each its name, and the triangles that meet at one point show what makes a pyramid. Then the faces, edges and vertices of each are counted on the drawing and written as sums (2 + 3 = 5, 3 + 3 + 3 = 9, 3 + 3 = 6 and 1 + 4 = 5, 4 + 4 = 8, 4 + 1 = 5), ending on the recap "Name each one by the shape of its base".
Concept: Prisms and pyramids: faces, edges and vertices
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In one sentence
The question this lesson answers
Is each one a prism or a pyramid, and what is its name?
A prism has 2 matching bases, one at each end.
Transcript
What the lesson says
Is each one a prism or a pyramid, and what is its name?
A prism has 2 matching bases, one at each end.
Its bases are triangles, so it is a triangular prism.
3 rectangles join the 2 bases.
It has 2 bases and 3 rectangles, so 5 faces.
It has 3 edges on each base and 3 joining them, so 9 edges.
It has 3 vertices on each base, so 6 vertices.
A pyramid has just 1 base.
Its other faces are triangles that meet at one point.
Its base is a square, so it is a square pyramid.
It has 1 base and 4 triangles, so 5 faces.
It has 4 edges around the base and 4 up to the top, so 8 edges.
It has 4 vertices on the base and 1 at the top, so 5 vertices.
Name each prism or pyramid by the shape of its base.
Curriculum
Where this fits
- British Columbia, Grade 5
Mathematics, Geometry and measurement: classification of prisms and pyramidsBC5-MA-30
Previous: How Long Is the Movie? Counting On to Find Elapsed TimeNext: Sorting Quadrilaterals by Sides and Angles
The outcomes and strands follow the British Columbia curriculum.
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