Is a < 2 ?
(1) in the xy-plane, the point (a,1) lies inside the circle whose equation is x2 + y2 = 3.
(2) in the xy-plane, the point (a,4) lies on the line whose equation is 2y + 4x = 10.

  yes to both

Step-by-step explanation:

(1) For y=1, and x=a, ...

  a² + 1² ≤ 3

  -√2 ≤ a ≤ √2 . . . . . subtract 1 and take the square root

All values of "a" are less than 2 inside the circle.

__

(2) For y=4 and x=a, ...

  2·4 +4·a = 10

  4a = 2 . . . . . . . subtract 8

  a = 1/2 . . . . . . .divide by 4

The value of "a" for point (a, 4) on the line is less than 2.

by definition, an arc subtended by a central angle of some given measure has the same measure. so .