Question

the weight of 2 books equals rhe weight of 6 balls . the weight of 7 books equals the weight of​

Answer 1

Answer:All four angles of a square are equal (each being 360°/4 = 90°, a right angle). All four sides of a square are equal. The diagonals of a square are equal.

Internal angle (degrees): 90°

Dual polygon: Self

Edges and vertices: 4

:

Answer 2

Hope this helps you
Answer = 21 balls