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Ket [755]
3 years ago
15

How do I prove that a quadrilateral is a rectangle? (in a Column chart with statement and reason)

Mathematics
1 answer:
klasskru [66]3 years ago
7 0
By definition, we have to:

 In plane geometry, a rectangle is a parallelogram whose four sides are at right angles to each other. Opposite sides have the same length.

 There is a proof that a quadrilateral is a rectangle:

  1) Its parallel sides are the same.

 2) Its two diagonals are the same, and they bisect each other at the common midpoint

 3) Any rectangle can be inscribed in a circle, two of whose diameters coincide with the diagonals of the rectangle.

 4) If all the angles of a quadrilateral are right angles, then it is a rectangle
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The class width is 20

Step-by-step explanation:

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3 years ago
Consider the statement "2 is a factor of n2 + 3n."
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Answer:

The answer is the last one:

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∵ n = 1 ⇒ ∴ (1)² + 3(1) = 1 + 3 = 4 ⇒ 2 is a factor of 4

∵ n = 2 ⇒ ∴ (2)² + 3(2) = 4 + 6 = 10 ⇒ 2 is a factor of 10

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∵ n = k + 1 ⇒ ∴ (k + 1)² + 3(k + 1) ⇒ before the simplify

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3 years ago
Solve for y you do not have to show your work<br> 9+4y-y+7=-14
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y= -10

Step-by-step explanation:

:)

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