What is the answer to this question?

130 degrees

Step-by-step explanation:

Remember to use 180 degrees, you subtract 180 from 50, to get angle 2, which is 130.

Like angle 1 would be; 180-60= 120

angle 3 would be; 180-70= 110

If it tells you to find the other side of the angles, (ex. opposite to 50degrees & angle 2) ; you would use 360degrees, which means the opposite side is also equal to 180, because 180 is *half* of 360degrees

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240

the answer is $42.96

step-by-step explanation: