As stated in the definition of a 'square': Sides and angles are all congruent and have the same measurement.
Find 1/2 of the square, use ΔADC.
Side AD and DC are 6 cm (given).
∠D is a 90° angle (definition of a square).
Because this is now an isosceles triangle, use the 1,1,√2 formula
1 = 6
1 x √2 = 6 x √2
6 x √2 = 8.485 (rounded)
8.485 is the measurement of AC. Divide it by half to find AE
8.485/2 = 4.2426 (rounded)
4.24 should be your answer
hope this helps
