If triangle abc has verticies a (1,2), b(-1,-1), and c(0,-2), which of the following coordinates is b of the dilation using the scale factor of 4

(-4,-4)

Step-by-step explanation:

Given

a (1,2), b(-1,-1), and c(0,-2)

Scale factor = 4

Required

Find the coordinates of b

Let the new coordinates of b be represented by b'

b' = b * scale factor

where b = (-1,-1)

scale factor = 4

b' = 4 * (-1,-1)

b' = (4*-1, 4 * -1)

b' = (-4,-4)

Hence, the new coordinates of b is (-4,-4)

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)