Question

I have the last one wrong can you please help me

Answer 1

Angles of a triangle

We know that for a right triangle

Using pythagorean theorem

a² + b² = c²

a² + 100² = 450²

a² + 10,000 = 202,500

a² = 202,500 - 10,000

a² = 192,500

a =√192,500

a = 438.748...

a ≅ 439