gure ur e angles test nding congruent sides of angles. gure, in PN. ZABD = ZALD 255ures riangles t parts, Torceles triange theorem Theorem: If two sides of a triangle are congruent then the age them congruent Given • In A ABC, side AB side AC To prove : ZABC = ZACB Construction : Draw the bisector of ZBAC which intersects side BC at point D. Proof : In A ABD and A ACD seg AB seg AC given ZBAD CAD construction Fig. 3.26 seg AD seg AD euro common side A ABDA ACD SAS Test (C2.c.t.) ZABC ZACB B-D- Corollary : If all sides of a triangle are congruent then its all angles are congruent. (write the proof of this corollary.) Converse of isosceles triangle theorem Theorem: If two angles of a triangle are congruent then the sides opposite to them are congruenit. Given : In A POR, ZPORZPRO To prove : Side POS side PR Construction : Draw the bisector of ZP intersecting side QR at point M Proof : In A PQM and A PRM M ZPOM SPA given LOPMRPM...Tonstruction Fig. 3.27 seg PME Les PBB common side A POMEA PRM SA test 7P 1 R
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Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
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