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remember area=pi*radius^2   the radius is 1. pi=3.14. this makes the equation A=3.14*1^2... this makes the answer roughly 3.14.

Step-by-step explanation: im built different

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.

y=3n + 1

step-by-step explanation:

this is wrong because it says the second number is one less and i added one instead