Alaina was asked whether the following equation is an identity: ( 2 x + 1 ) 2 − ( x + 1 ) 2 = 3 ( x + 1 ) 2 − 1 (2x+1) 2 −(x+1) 2 =3(x+1) 2 −1

21

step-by-step explanation:

d. it is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.

step-by-step explanation:

60: 45 =12: 9 =4: 3 so the answer is 4: 3

      2

  2 is to go somewhat to the top right of a because it is squared    

v= a h/3