The total s urf ace area of a regul ar triangular pyramid with each edges of length 1 cm is ?
A. $4\sqrt3$ $cm^2$
B. $\sqrt3$ $cm^2$
C. 4 $cm^2$
D.$4\over3$$\sqrt3$ $cm^2$
[ A ] a
[ B ] b
[ C ] c
[ D ] d
Answer : Option B
Explanation :
Each side of triangular pyramid = 1 cm Total surface area =$\sqrt3$ $a^2$
=$\sqrt3$x1x1 =$\sqrt3$ $cm^2$