Question

Only a few minutes please help!!

A) 20
B) 50
C) 90
D) 120

Answer 1

C 90

Explanation:

Answer 2

Answer: OPTION B.

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\°`