Could someone plz me with these questions?

1.
equailateral
all angles are equal
3x=180
x=60

see x+y=180 since straight line
so
60+y=180
y=120
x=60
y=120

3.

2 angles are 35 and congruent

35+35+3x+20=180
90+3x=180
minus 90
3x=90
divide 3
x=30

4.

ok so
180=50+?+?
minus 50
130=2?
divide 2
65=?
now we have that is a straight line so
180=65+?
115=?
now
115+?+?=180
2?=65
divide both sides by 2
?=32.5

49π cm^2

Step-by-step explanation:

So the radius is 7 and the area of the circle is πr^2

49π cm^2