Mathematics
Grade9
Easy

Question

Name the postulate that makes the triangles congruent.

 

  1. SAS
  2. ASA
  3. AAS
  4. Not possible

hintHint:

If any two angles and the side included between the angles of one triangle are equivalent to the corresponding two angles and side included between the angles of the second triangle, then the two triangles are said to be congruent by ASA rule.

The correct answer is: ASA


    Here, by observing the diagram we get
    ∠AEB = ∠DEC (vertically opposite angles are equal)
    EC = EA ( given by notation in the diagram )
    ∠A = ∠C = 90° 
    Here, two angles and the side included between the angles of one triangle are equivalent to the corresponding two angles and side included between the angles of the second triangle
    By ASA rule, Both the triangles are congruent.

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