Question

Need help which one is it
a)x=7
b)x=12
c)x=20

Answer 1

c. X = 20

Explanation:

Pythagoras theorem

a² + b² = c²

12² = 144

16² = 256

144 + 256 = 400

√400 = 20

Answer 2

- you can use the pythagorean theorem for this.

a^2 + b^2 = c^2

12^2 + 16^2 = c^2

144 + 256 = c^2

400 = c^2

- square root this.

c = 20

therefore, x = 20.

so option C.