Answer:
There can be only 1 right angle(90°) so answer A
Explanation:
If a triangle is equal to 180 °
And each right angle is equal to 90°
Then there can be 2 or 3 becouse if it was 2 it would be a full 180° but we still need 1 more corner and if it would be 3 right angles then it would be 270 with is way farther then the capability of a triangle.