Question

Calcuate height of equilateral triangle each of whose sides measures 12 cm​

Answer 1

Step-by-step explanation:

P=3a

a=12

P=3×12=36

this correct answer

Answer 2

By pythagoras theorem:

H^2=B^2+P^2

12^2 =6^2 + P^2

144=36 +P^2

144-36 =P^2

P^2 =108

P^2 = 108

P= 10.39cm