What is the Pythagorean Identity?

Group of answer choices

LaTeX: x^2+y^2=r^2 x 2 + y 2 = r 2 x 2 + y 2 = r 2 x 2 + y 2 = r 2

LaTeX: a^2+b^2=c^2 a 2 + b 2 = c 2 a 2 + b 2 = c 2 a 2 + b 2 = c 2

LaTeX: \sin^2\Theta+\cos^2\Theta=1 sin 2 ⁡ Θ + cos 2 ⁡ Θ = 1 sin 2 ⁡ Θ + cos 2 ⁡ Θ = 1 sin 2 ⁡ Θ + cos 2 ⁡ Θ = 1

LaTeX: x^2+y^2=1 x 2 + y 2 = 1 x 2 + y 2 = 1 x 2 + y 2 = 1

Scenario: susan wants to make 2 square flags to sell at a crafts fair. the fabric she wants to buy is 3 meters wide. she doesn't want any fabric left over. what's the least amount of fabric she should buy? question: which equation will susan solve her problem? note: let x represent the length of 1 side of the flag. options: 1) 2x^2 = 4x 2) 8 +2x = 2(4x) 3) 2 * 2 = 4 * 2 4) 4x^2 -2x = 0