d2 = a2+a2 − 2a*a*cosα
a2(2 − √2) = 2a2 − 2a2*cosα
2a2 − a2√2 = 2a2 − 2a2*cosα
2a2cosα = a2√2
√2
cosα =
⇒ α=45o
2
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d2 = a2+a2 − 2a*a*cosα
a2(2 − √2) = 2a2 − 2a2*cosα
2a2 − a2√2 = 2a2 − 2a2*cosα
2a2cosα = a2√2
√2
cosα =
⇒ α=45o
2