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Question: Isosceles triangles ABC and PQR are congruent. Angle bisectors of ∠ ABC and ∠ ACB meet at D. Angle bisectors of ∠ PQR and ∠ PRQ meet at M. With what postulate of congruency of triangles can you prove that BD = QM? A ) AAA postulate B ) SAS postulate C ) ASA postulate D ) AAS postulate Steps to derive 1 Since ΔABC ≅ ΔPQR, AB ≅ PQ, AC ≅ PR, BC ≅ QR.2 ∠ ABD + ∠ DBC = ∠ PQM + ∠ MQR [Since BD and QM are the angular bisectors.]3 ⇒ ∠ DBC ≅ ∠ MQR4 Similarly, ∠ ACB ≅ ∠ PRQ5 ∠ ACD + ∠ DCB ≅ ∠ PRM + ∠ MRQ6 ∠ DCB ≅ ∠ MRQ7 BC ≅ QR [Since ΔABC ≅ ΔPQR.]8 If two angles and included side of one triangle are congruent to two angles and the included side of another triangle, then the two triangles are congruent. [ASA postulate.]9 Hence ΔBDC ≅ ΔQMR [ASA postulate.]10 Hence BD = QM.11 So, ASA postulate can be applied to prove that BD = QM.Hence the right answer is Option C Click Here To Go Back Few Other Questions - Find the standard form of the equation for the hyperbola whose transverse axis has end poi.. Find the foci of the hyperbola (x - 5)²256 - (y + 5)²144 = .. Find an equation in the standard form for the hyperbola with center at (0, 0), a = 4, e = .. Choose the equation in standard form for the given conic. [Given a = 7, b = 5.].. Choose a type of conic whose polar equation is given by r = 32 + 3 cos&nbs.. Find the standard form of the equation for the ellipse whose major axis has end points (- .. Find an equation in standard form for the ellipse whose end points of axes are (± 9.. Choose the horizontal asymptote to the graph of the function f(x) = 4x3-5x4 + 7... Find the vertical asymptotes of the function f(x) = x - 8x2+49x... 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