Answer:
Step-by-step explanation:
12 is 1 more than 11
12 is one less than 13
this ok?
Answer:
the lines are neither perpendicular or parallel
16 I just know that it's 16 GL to ya
2x+38=180
2x=142 (or x+x=142 from which 2x=142)
x=71
The unknown angles are each 71
You know this answer is logical as, since two sides are 21 it hints that we are looking at an equilateral triangle, which means two of its angles will be the same
