Answer:
27mi
Step-by-step explanation:
Since the sailing course is equilateral in shape, then all their sides are equal.
Get one of the sides using Pythagoras theorem as shown;
Let one of the side be x
Two base will be x/2
According to the theorem;
x² = 9² +(x/2)²
x² = 81 + x²/4
x²-x²/4 = 81
3x²/4 = 81
3x² = 324
x² = 324/4
x² = 81
x = 9
Perimeter of the triangle = 3x
Perimeter of the triangle = 3(9)
Perimeter of the triangle = 27mi
............................... is not a school related question
11/17
150, 155, 160, 165, 170, 175, 180, 185, 190, 195, 200
There are 11 numbers when counting by 5.
150, 153, 156, 159, 162, 165, 168, 171, 174, 177, 180, 183, 186, 189, 192, 195, 198
There are 17 numbers when counting by 3.
Andrew/Sam = 11/17
C.155
CALCULATE IT ITS MA ANSWER