Answer:
A = 143.2
Step-by-step explanation:
A= πr² = π(6.75)² =
× 45.5625 = 143.196 ≈143.2
Answer:
9
Step-by-step explanation:
Answer:
option B. 
Step-by-step explanation:
we know that
1) The two diagonals of a rhombus are perpendicular
2) The sum of the interior angles in any triangle must be equal to 180 degrees
Let
O ----> the intersection point of the diagonals of the rhombus
In the right triangle OAD

solve for x




It has to be at lest 9u2-4?