MCQ practice · SSC General Mathematics Board questions · Chapter 6: Lines, Angles and Triangles
What is the height of an equilateral triangle of side 4 cm, in cm?
Think it through first, then pick an option.
- a 2√3
- b 2√5
- c 4√3
- d 5√2
Answer and explanation
Correct answer: a 2√3
height² = 4² − 2² = 12, so the height is 2√3.
Why the other options are wrong
- b 2√5: 2√5 would come from 20; here 16 − 4 = 12.
- c 4√3: 4√3 exceeds the side (4); the height is shorter than a side.
- d 5√2: 5√2 does not come from the height formula: PM² = ¾ × 16 = 12, so the height is √12 = 2√3.
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