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January 26, 2015

January 26, 2015

Posted by **Brigitta** on Thursday, January 31, 2013 at 10:56pm.

- math -
**Reiny**, Thursday, January 31, 2013 at 11:51pmdid you make a sketch?

I have a large isosceles triangle containing your original trapezium

The sides of the triangle are made up of the segments 10 and 8 for a total length of 18 each

I see a smaller isosceles triangle contained and similar to a larger isosceles triangle

let the smaller base be x

remember the sides of similar triangles are in the same ratio

so....

x/8 = 20/18

x = 8(20/18) = 80/9 or appr. 8.89 cm

- math -
**Brigitta**, Friday, February 1, 2013 at 11:03pmthank u so much!:)

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