Triangles A C B and M Q R are shown. Sides A B and M R are congruent. Angles C A B and M R Q are 42 degrees. Angle C B A is 53 degrees. Angle M Q R is 85 degrees.
Are the triangles congruent? Why or why not?

Respuesta :

Incomplete Question. The Complete Question with figure is below.

Answer:

Therefore, the Triangles ACB and RQM are Congruent by

  • Angle -Side-Angle Congruence test.
  • Angle-Angle-Side Congruence test.

Step-by-step explanation:

Given:

AB ≅ MR

∠CAB = 42°

∠MRQ = 42°

∠CBA = 53°

∠MQR = 85°

To Find:

Are the triangles congruent? Why or why not?

Solution:

Triangle sum property:

In a Triangle sum of the measures of all the angles of a triangle is 180°.

In ΔMRQ,

[tex]\angle MRQ+\angle MQR+\angle RMQ=180\°[/tex]

Substituting the values we get

[tex]42+85+\angle RMQ=180\\\angle RMQ=180-127=53\\\angle RMQ=53\°[/tex]

∠CBA ≅ ∠RMQ = 53° ...Transitive Property...... ( 1 )

Now,

In  ΔACB  and Δ  RQM

∠CAB ≅∠MRQ = 42°   ……….{Given}

AB ≅ MR                      ……….{Given}

∠CBA ≅ ∠RMQ = 53°   ..……..{From ( 1 )}

ΔACB  ≅ ΔRQM           ......….{By Angle-Side-Angle Congruence test}

Also it can be Proved by A-A-S congruence test

In ΔACB,

[tex]\angle A+\angle B+\angle C=180\°[/tex]

Substituting the values we get

[tex]42+53+\angle C=180\\\angle C=180-95=85\\\angle ACB=85\°[/tex]

∠ACB ≅ ∠MQR= 85° ...Transitive Property...... ( 2 )

Now,

In  ΔACB  and Δ  RQM

∠CAB ≅∠MRQ = 42°   ……….{Given}

∠ACB ≅ ∠MQR= 85°    .........{ From ( 2 ) }

AB ≅ MR                      ……….{Given}

ΔACB  ≅ ΔRQM           ......….{By Angle -Angle-Side Congruence test}

Therefore, the Triangles ACB and RQM are Congruent by

  • Angle -Side-Angle Congruence test.
  • Angle-Angle-Side Congruence test.

Ver imagen inchu420

Answer:

B

Step-by-step explanation:

Yes, they are congruent by either ASA or AAS.