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Geometry Solution Page 147-3

Geometry Solution Page 147-3:

We think there is an error in the calculation of line segment AB on this page. We don't see an errata sheet for this.

We have:

AB squared = 5 squared + 5 squared

AB = square root of 50

AB = 7.1 cm

The solution page says the square root of 50 = 8.7 cm.

My son noticed that while the length of the edges from the apex to the base are 8.7 cm.

Thanks,
Julia & Liam