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The diagram shows a rectangle, ABDE, and
two congruent triangles, AFE and BCD.
area of rectangle ABDE = area of triangle AFE + area of triangle BCD
AB: AE = 1:3
Work out the length of AE.
In all working, let the length of AE be a cm.

The diagram shows a rectangle ABDE and two congruent triangles AFE and BCD area of rectangle ABDE area of triangle AFE area of triangle BCD AB AE 13 Work out th class=

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