Question

The altitude of equilateral triangle whose side is 12 cm​

Answer 1

Answer:

36_root 3

Step-by-step explanation:

1. area of equilateral triangle=root3(a)2/4
2. root_3×(12)2/4
3. root_3×144/4
4. 36_root_3

Answer 2

Answer:10.4cm

Step-by-step explanation:let ABC be an equilateral triangle

AD be the altitude. Altitude of an, equilateral triangle divides the side into 2 equal halves.

BD=CD=6cm

AB=12cm ( given )

Using the pythagoras theorem,

AB^2 = BD^2+AD^2

12^2=6^2 + AD^2

144-36 =AD^2

108=AD^2

AD=root108 = 10.4cm