acute triangles
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There are an infinite number of different triangles, with all different shapes and sizes, that all have 45-degree angles. If it happens to be a right triangle, then it has two 45-degree angles, and it's an isosceles right triangle.
90 - 45 = 45 So another 45 degree angle is the complement of a 45 degree angle.
They are the triangles that contain a 90 degree angle and two acute angles
As many as you like because any triangle that has a 90 degree angle is always a right angle triangle.
it will become 45 degree