Answer:
Step-by-step explanation:
Consider the coordinates of B(x,y).
as M is midpoint of AB so,
2a = (x+a)/2
4a = x + a
x = 4a - a
x = 3a
Now for we will find y
2 = (7+y)/2
4 = 7 + y
y = 4 - 7
y = -3
Hence coordinates of B are ( 2a, -3 )
The perimeter of the following rectilinear figure is 54 units.
<h3>What is Perimeter ?</h3>
Perimeter of a figure is the distance covered when a person walk one round across its edges .
The given figure is in the form of a rectangle ,
The perimeter is equal to the sum of all sides ,
The bottom base is 13 includes (base of the small extended figure )
The left side is 14(includes left side of the small extended figure)
The right side is 10+5+4 (includes right side of the small extended figure)
The top is 8
Therefore the perimeter is 13+14+10+5+4+8 = 54 units
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Answer:
13 minutes
Step-by-step explanation:
Person 1: 1 min
Person 2: 2 min
Person 3: 7 min
Person 4: 10 min
Person 1, 3, and 4 cross first, which will take 10 minutes.
Then, Person 1 comes back, taking 1 minute.
Person 1 and Person 2 cross the river, taking 2 minutes.
10 + 1 + 2 = 13 minutes.
The small triangle and big triangle are similar - this means they have the same angles. So, if you know the ratio of a side of the big triangle (12) to a side of the small triangle inside it (4), you know the ratio of the other sides. In this case, the side ratio (small to big triangle) is 1/3. Thus, the missing side length is 18/3=6.
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