What is the minimum number of equilateral triangles, of side length 1 unit, needed to cover an equilateral triangle of side length 10 units?

Question

Please help with this question ASAP

Answer 1

if big triangel=1 side, need 1 triangel tu kuver it

if base=2, need 4 triangels=1+3

if base=3, need 9...5+3+1

if base=4, need 7+5+3+1=16 triangels

if base=5, need  9+7+5+3+1=25 triangels

if base=6, need 11+9+7+5+3+1=36 tri

base=7, need 13+11+9+7+5+3+1=49

me assume yu kan keep goin til yu get tu 10