How many straight lines are there in the given figure?
2022
How many straight lines are there in the given figure?
- A.
9
- B.
11
- C.
12
- D.
48
Attempted by 102 students.
Show answer & explanation
Correct answer: C
Key insight: count the distinct straight lines by their direction (horizontal, slanting left, slanting right).
Horizontal lines: 4 (the base plus three parallel horizontal lines above it).
Left-slanting lines: 4 (the left outer edge plus three lines parallel to it inside the triangle).
Right-slanting lines: 4 (the right outer edge plus three lines parallel to it inside the triangle).
Total number of straight lines = 4 + 4 + 4 = 12