write a letter to your headteacher discussing two games that should be encouraged among students in your school

Flashcard games to maintain a healthy brain and soccer to increase the level of physical activity.

Explanation:

It has been shown that card games stimulate memory and activate visual brain areas involved in learning including the prefrontal cortex and the striatum.  

Moreover, soccer is a funny sport that enables to maintain a healthy cardiovascular system, which simultaneously supports the development of motor and cognitive skills. In addition, it is an excellent way to learn how to work with others and to develop communication and social skills.

a, b, c - sides of a triangle

a + b > c

a + c > b

b + c > a

we have a = 5m and b = 11m. substitute:

5 + 11 > c

16 > c → c < 16

5 + c > 11         subtract 5 from both sides

c > 6

11 + c > 5         subtract 11 from both sides

c > -6

c < 16 and c > 6 and c > -6

thereofre your answer is 6m < c < 16m