Question

what are the angle of rotation needed to rotate the right angled triangle onto itself​

Answer 1

Angle of rotation needed to rotate the triangle onto itself - 360°

• A right triangle has no lines of symmetry as in an equilateral triangle or a regular pentagon or hexagon.
• If an equilateral triangle is rotated by 120°, the triangle rotates onto itself.
• Similarly, if a pentagon is rotated by 72°, it rotates onto itself.
• But these are symmetrical shapes. An asymmetrical shape as a right triangle needs to go full 360° before it can be rotated onto itself.
• Hence, the answer.