Find the perimeter of a square of whose diagonal measures 12cm

check the picture below.

recall that in a square, all four sides are equal, therefore b = a.

so the perimeter is then 6√2 + 6√2 + 6√2 + 6√2, or 24√2.

b.y= -1/2x+2

Step-by-step explanation:

The graph is a line then it’s equation has this form y = ax + b where a the slope and the y-intercept

the y-intercept b = 2 cause the line intersects the y-axis at the point (0 , 2)

Finally,

y = ax + b

 = (-1/2)x + 2