Answer:
Thanks
Step-by-step explanation:
This is an equilateral triangle of height a√3/2 where a is the side length. So the area is ½a.a√3/2=a²√3/4.
So a²=25 and a=5cm. Therefore the perimeter is 3a=15cm.
Answer:
A
Step-by-step explanation:
If I'm completely honest I'm not really sure of this cause I hv another way of doing this...
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Answer:2/7
Step-by-step explanation: