Find the value of x in the isosceles triangle shown below.

x=4

Explanation:

since it is an isosceles triangle, line x splits the base into 2 equal parts.

using a smaller triangle we know the sides are 5,3,x

now use Pythagorean theorem

x =

x = 4, -4

since length cannot be negative, x = 4

answer; (d) melting of sea ice;