Question

Work out the length x.
14 cm
7 cm
х

Answer 1

Using Pythagorean Theorem,

x^2 + 7^2 = 14^2

x^2 + 49 = 196

x^2 = 147

x = ~12.12

Answer 2

x = 12.12

Explanation:

Using the formula

c=a2+b2

Solving forb

b=c2﹣a2=142﹣72 ≈ 12.12436