Which statement about adjacent angles is true?
a. they face toward each other.
b. they share a common side.
c. they sum to 90 .
d. they each must measure less than 90 .?

The statement which is true about adjacent angles is they share a common side.

Step-by-step explanation:

To Find : Which statement about adjacent angles is true?

Solution :

Definition:Two angles are said to be Adjacent when they have a common side and a common vertex

So, Option B is true i.e.  they share a common side.

Hence The statement which is true about adjacent angles is they share a common side.

check the picture below.

x= -3

step-by-step explanation:

step 1: simplify brackets

4 - x - 1 = 6

step 2: simpilfy

3 - x = 6

step 3: subtract 3 from both sides

-x = 6 - 3

step 4: simpilfy 6 - 3

-x = 3

step 5: multiply both sides by -1

x = -3