NEED HELP PLEASE I ONLY HAVE 3 MINUTES LEFT WILL GIVE BRAINLIEST PLS HELP Explain the Angle Theorems and solve out the following the applications:

Step-by-step explanation:

B =20+20 = 40

Then because the side issue B and issue C are congruent their angles are congruent so angle C = 40

A triangle is 180 total so subtract B and C to find A

A = 180-40-40 = 100

I do not remember the names of all the theorems.

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true