The answer is 374 cm²
Area (A) of a hexagon with side a is:

A ≈ 374 cm²
Given:
Consider the below figure attached with this question.
To find:
The measure of angle r by using the cosine rule.
Solution:
According to Law of Cosine,

Using the Law of Cosine, we get




On further simplification, we get






Therefore, the measure of angle r is 106.78 degrees.
Answer:
60%
Step-by-step explanation:
Answer: C
Step-by-step explanation:
Square piramid ,triangle prism.