# The difference be

Given the difference between the two acute angles of a right-angled triangle is 2π/5 radians.

We know that π rad = 180° 1 rad = 180°/ π

Given  = (36 × 2) °

= 72°

Let one acute angle be x° and the other acute angle be 90° - x°.

Then,

x° - (90° - x°) = 72°

2x° - 90° = 72°

2x° = 72° + 90°

2x° = 162°

x° = 162°/ 2

x° = 81° and 90° - x° = 90° - 81° = 9°

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