The circumcentre of an equilateral triangle is at a distance of 3.2 cm from the base of the triangle. What is the length (in cm) of each of its altitudes?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 9.6.
From the equilateral triangle property, O is the circumcenter as well as the centroid.
OD = AD/3
AD = 3 × OD
AD = 3 × 3.2 = 9.6 cm