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andrew-mc [135]
2 years ago
8

A square rotated about its center by 360º maps onto itself at: a) 1 B) 2 C) 3 D) 4 different angles of rotation. You can reflect

a square onto itself across A) 2 B) 4 C) 8 D) 16 different lines of reflection.
Mathematics
2 answers:
grandymaker [24]2 years ago
4 0

Answer:  A square rotated about its center by 360º maps onto itself at D) 4 different angles of rotation. You can reflect a square onto itself across B) 4 different lines of reflection.

Step-by-step explanation:

A square is a geometric figure which has all its four sides equal and all its interior angles are right angles( 90^{\circ}) .

Therefore, it can be rotated about its center by 360^{\circ} .

It maps onto itself at 4 different angles of rotation ( at every 90^{\circ} angle).

We can reflect a square onto itself across 4 different lines of reflection (2 across the non-parallel sides and 2 across the vertices of the square).

NeTakaya2 years ago
3 0

Answer:

For plato: Blank one is four and blank two is also four.

:)

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herlene has 5.05 in quarters and dimes. The number of quarters is one more than twice the number of dimes. Find the number she h
VLD [36.1K]

Answer:

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Step-by-step explanation:

<u>System of Equations</u>

Let's call:

x = number of dimes Herlene has

y = number of quarters Herlene has

Since each dime has a value of $0.10 and each quarter has a value of $0.25, the total money Herlene has is 0.10x+0.25y.

We know this amount is $5.05, thus:

0.10x + 0.25y = 5.05        [1]

It's also given the number of quarters is one more than twice the number of dimes, i.e.:

y = 2x + 1        [2]

Substituting in [1]:

0.10x + 0.25(2x + 1) = 5.05

Operating:

0.10x + 0.5x + 0.25 = 5.05

0.6x = 5.05 - 0.25

0.6x = 4.8

x = 8

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y = 2*8 + 1 = 17

y = 17

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4 0
1 year ago
Review the proof of the identity cos(π − A) = −cosA.
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Answer:

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1 year ago
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