Answer:
if a polygon is square,then it is also a rectangle is correct
Step-by-step explanation:
1)if a polygon has 4 right angles,then it is a square is wrong since in the statement a square has all its angles as right angles but it need not imply that it is a square as it could also be a rectangle
2) polygon need not have four right angles eg:rhombous with angles 60°,60°,120°,120° is also a polygon
3)every polygon need not be a rectangle as it could be square
4)if a polygon is square, then all its angles are right angles and if all its angles are right then it is rectangle.
hence option 4 is true.
Answer:
x=7
Step-by-step explanation:
u just have to flip the signs,
the answer is C
Answer: 4 cakes left in all.
Step-by-step explanation:
Given: Cakes left on first day= 
Cakes left on second day =
The number of cakes left in all=
⇒The number of cakes left in all=
Therefore, The number of cakes left in all=4