Answer:
the people were shaking hands so there are 16 pair of people
The area of the triangle is 60 cm .
the 2nd figure's area is 2520 cm.
Get I don't know the answer but there is this app called Photo Math! it works perfectly lots of teachers recommend it I suggest you download it, it shows you the answer and show you step by step. its for iPod, iPhone, Samsung , and Androids
Convert to log and then divide but it’s 12.5
