In Exercises 9 to 12, determine whether the sets have a subset relationship. Are the two sets disjoint or equivalent? Do the sets intersect?

The relationship between the two given sets.
If two sets do not have any element in common, then they are called as disjoint sets.
Given:
The given sets are,
And,
Approach:
A triangle with a right angle and two acute angles is a right triangle and a triangle with an obtuse angle and two acute angles is an obtuse triangle
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