A polygon with four congruent sides is a square, or a diamond. This may apply if it also has four right angles.
Another option may be a rhombus, which will apply if it does NOT have any right angles.
Remember: Congruent means the same.
Your answer is a square.
You didn't specify 10 what. However, a yard is equal to 36 inches, or about 3 feet.
Answer:
115
Step-by-step explanation:
5 groups of flowers times 10 vases
5*10 = 50 different combinations