If aed and ced are both right triangles, what triangle congruence could be used to prove that the two triangles are congruent
(hint: it is not hypotenuse leg)

The two triangles are congruent by AAS postulate.

Step-by-step explanation:

From the figure,

°

°

So, °

For the given triangles ,

Therefore, the triangles are congruent by AAS postulate as two angles and one corresponding sides are congruent.

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐