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nydimaria [60]
3 years ago
11

The perimeter of a regular pentagon is 41.5 cm. Write and solve an equation to determine the length of each side of the pentagon

.
Mathematics
1 answer:
Sveta_85 [38]3 years ago
5 0

Answer:

41.5÷5= the answer 8.3 cm

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????(−2, 10) is the midpoint of . If ???????? has coordinates (4, −5), what are the coordinates of ?????
Sonbull [250]

Answer:

The coordinates of B are (-8,25).

Step-by-step explanation:

Consider the completer question is " M(−2, 10) is the midpoint of AB. If A has coordinates (4, −5), what are the coordinates of B".

Let coordinates of B are (a,b).

Formula for midpoint:

Midpoint=(\dfrac{x_1+x_2}{2},\dfrac{y_1+y_2}{2})

Midpoint of A and B is

Midpoint=(\dfrac{4+a}{2},\dfrac{-5+b}{2})

It is given that M(−2, 10) is the midpoint of AB.

(-2,10)=(\dfrac{4+a}{2},\dfrac{-5+b}{2})

On comparing both sides we get

-2=\dfrac{4+a}{2}

Multiply both sides by 2.

-4=4+a

Subtract 4 from both sides.

-8=a

The value of a is 8.

Similarly,

10=\dfrac{-5+b}{2}

Multiply both sides by 2.

20=-5+b

Add 5 on both sides.

25=b

Therefore, the coordinates of B are (-8,25).

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Fiona drew a regular polygon that first maps directly onto itself after rotating 15 degrees. How many sides does the polygon hav
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The answer is the polygon have 24 sides.

Solution is shown step by step: Let c be the 15 degrees.

1. C = 360 divided by n

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It is also already in simplest form

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