Consider three angles ABC, PQR and LMN. If ∠ABC≅∠PQR and ∠PQR≅∠LMN, then ∠ABC≅∠LMN
ΔDEF and ΔLMN are congruent in the correspondence EDF↔LMN. Write the pairs of congruent sides and congruent angles in the correspondence.
ΔLMN∼ΔPQR, 9Ar(ΔPQR)=16Ar(ΔLMN). If QR=20 then Find MN.