ajutttttttttttttooooooorrrrreeereeeeeeeeeerer ex 1,2

Răspuns:
IJ ≡ LM
IK ≡ LN
∡I ≡ ∡L
Explicație pas cu pas:
Δ IJK ≡ Δ LMN
JK ≡ MN ; ∡J ≡ ∡M ; ∡K ≡ ∡N