What is the measure of Angle B A C?

Triangle A B C. Angle B is 50 degrees, angle C is 50 degrees, and angle A is blank.

50 degrees
80 degrees
100 degrees
130 degrees

80 degrees

Step-by-step explanation:

a a triangle measures 180 degrees. can you add 50 + 50 to get 100. 180 - 100 to get 80

80 degrees

Step-by-step explanation:

rule : angles in a triangle add up to 180 degrees

so 50+50=100 and 180-100=80

∠lno ≅ ∠lnm

∠oln ≅ ∠mln

step-by-step explanation:

given   that triangle lno is congruent to triangle lnm.

we have to fill up the blanks in the given question.

according to above order of congruency   kept in mind we can say that

∠lno ≅ ∠lnm

∠oln ≅ ∠mln

ln ≅ ln due to common in both.

hence, by sas congruency,

the side angle side rule   states that if two sides and the included angle of one triangle are congruent to another triangle, then these two triangles are congruent.