0.2 as a decimal mixed number or a fraction

It is a mixed number because a fraction would be like 4/9.

Step-by-step explanation:

How you remember is that a decimal is in a place that makes it a mixed number,

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

quit

step-by-step explanation: