Explanation:
a/q first we have to find the measurement of third side
so,
h² = a² + b²
4² = a² + 2²
16 = a² + 4
a = 16 - 4 = 12
a² = 12
a = √12 = 3.46
so,
area of square = a × a
= 3.46 × 3.46 = 11.97 sq unit
hope this answer helps you dear...take care!