# Tetrahedron and Pyramid

A tetrahedron and a pyramid have edges of equal length. If they are glued together on a triangular face with the vertices aligned, how many faces will the new shape have?

Time: 3:47

#### Rounding Snap

If the last card put down equals the previous card to the nearest whole number then all players race to shout SNAP! So far this activity has been accessed 10475 times and 91 people have earned a Transum Trophy for completing it.

Teacher: Click the play button in the centre of the video screen above. In the bottom right corner of the video (when you cursor moves over the playing video) is a broken square button which opens full-screen mode.

## Tetrahedron and Pyramid

#### A tetrahedron and a pyramid have edges of equal length. If they are glued together on a triangular face with the vertices aligned, how many faces will the new shape have?

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