Entry Exam Category: High School Equivalency Exams
Course: HiSET
Exam: HiSET Math Practice Test
Practice Question
The following is a list of triangles: I. Right triangles, II. Isosceles triangles, III. Equilateral triangles. A pair of triangles from which of these groups must be similar to each other?
Answer Choices
- A: I only
- B: II only
- C: III only
- D: I and III only
Correct Answer: C
Rationale: Equilateral triangles (III) are similar as all angles are 60° and sides proportional. Right triangles (I) or isosceles triangles (II) are not necessarily similar unless additional conditions apply. Options: I, II, I and III incorrect; III correct.