Chapter 4.5, Problem 7WE

To determine

To name the method (SSS, SAS, ASA, AAS or HL) to prove $△AOB\cong △AOC$

Answer to Problem 7WE

SAS method.

Explanation of Solution

Given:

The given figure is-

  

  $AO\perp \text{ plane M,}AB\cong AC$

Calculation:

In $△AOB,△AOC$

  $AO\perp \text{ plane M,}$ -----------Angle.

  $AB\cong AC$ ..............Side

  $AO\cong AO$ ............. Side

By SAS property both the triangles $△AOB\cong △AOC$ are congruent.