S.A Stands for Sine Anno.
Answer:
Gravitational Force, Normal Force, and Friction Force
Explanation:
It was first detected by Robert Wilson and Arno Penzias.
The given angles sum to less than 90°, so the remaining angle must be more than 90°. (The total of all angles is 180°.) Triangle ABC has an angle greater than 90°, so is obtuse. Since the triangles are similar, their corresponding angles are congruent. Hence ...
.. D. Triangle XYZ is obtuse.
