Which relationship is always correct for the angles p, q, and r of triangle abc?

p + r = q
p + q + r = 180 degrees
p + q + r = 90 degrees
q + r = p

The correct answer is q + r = p.

The reason that we know this is that we know all the interior angles will add up to 180. We also know the angle opposite to p (let's call it s) will be equal to 180 - p since together they create a straight line. So, we can set up this equation and solve using that substitutation.

q + r + s = 180 ---> Sub in p value

q + r + (180 - p) = 180 > Subtract 180 from both sides

q + r - p = 0 > Add p to both sides

q + r = p

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

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