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2 3 si 4 repede dau 24 p

2 3 Si 4 Repede Dau 24 P class=

Răspuns :

2. conguente ULU
3. congruente LLL
4. a)∡ABC=∡CBD
AB=BD, BC=CB=> ΔABC=ΔCBD (LUL)
    b) ΔABC=ΔCBD=>AC=CD=35 cm
                              =>∡ACB=∡BCD=30°
∡ACD=∡ACB+∡BCD=30+30=60°