Geometry

Question Analysis:
This question involves classifying a triangle based on angle measures.
The main focus is identifying a right triangle and determining if it is scalene or isosceles.

Key Concept Explanation:
Acute Triangle: All angles are less than 90°.
Right Triangle: Has one 90° angle.
Isosceles Triangle: Has at least two equal angles and sides.
Scalene Triangle: Has no equal angles or sides.

Step-by-Step Solution:
Identify the given angles: 35°, 55°, and 90°.
Since there is a 90° angle, the triangle is a right triangle.
Check for equal angles or sides:
The angles 35° and 55° are different, meaning no two sides are equal.
Since the sides are all different, the triangle is scalene.
Checking the answer choices:
(A) Acute Triangle ❌ Incorrect, because a right triangle has a 90° angle, not all <90°.
(B) Right Triangle ✅ Correct, because one angle is 90°.
(C) Isosceles Triangle ❌ Incorrect, bec...