Sort:  

(A) It would take 26 triangles to build Pattern 5
(B) It would take 442 triangles to build Pattern 21
(C) Error

Coin Marketplace

STEEM 0.18
TRX 0.15
JST 0.029
BTC 61963.30
ETH 2416.68
USDT 1.00
SBD 2.67