20 because radius times height will give you the surface area of the shape
Id take a guess and say line 1 because the rest looks correct
Answer:
Step-by-step explanation:
if we have a right triangle,
one angle=90
180-90=90
let x be one angle, and y another angle
the other is 2x+30
x+2x+30=90
3x=60
x=20
y=70