Which of the following has the largest value?

  1/2

Step-by-step explanation:

1/2 = 0.50 has a larger value than 0.09 or 0.35 (=35%).

The largest value is 1/2.

Decimal numbers are compared left to right. Comparisons are made of digits having the same number place, so tenths are compared to tenths (for starters). Here, that means you're comparing 5 tenths to 0 tenths to 3 tenths. 5 wins.

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.

answer: options?

step-by-step explanation: