Current location - Training Enrollment Network - Mathematics courses - Mathematics is recommended for the second day.
Mathematics is recommended for the second day.
1) Prove that △ADE is all equal to △CDF? AE=CF? Similarly BF=CE because in Rt△CEF, CE &;; sup2+CF & amp; Sup2= EF & ampsup2, so

AE & ampsup2+BF & amp; sup2= EF & ampsup2?

2) Fold △ACE along CE and △BCF along CF? Because ∠ ace+∠ BCF = ∠ ECF = 45? So after folding,

AC and BC overlap as CP connection PE? PF is available ∠ EPF = ∠ A+∠ B = 90, so AE & sup2+BF & amp; sup2= EP & ampsup2+FP & amp; sup2= EF & ampsup2