Question

Only a few minutes please help!! A) 20 B) 50 C) 90 D) 120

Answer 1

Answer:

C 90

Step-by-step explanation:

Answer 2

Answer: OPTION B.

Step-by-step explanation:

You can observe in the figure provided that the angle 3 and the angle that measures 70° , share the same vertex, therefore, you can conclude that they are Vertical angles and they are congruent. Then:

$m\angle 3=70\°$

You can notice that the angle 1 and the angle that measures 70° are Complementary angles (They add up to 90°), then you can find the measure of the angle 1:

$m\angle 1+70\°=90\°\\\\m\angle 1=90\°-70\°\\\\m\angle 1=20\°$

Then:

$m\angle 3-m\angle 1=70\°-20\°\\\\m\angle 3-m\angle 1=50\°$