Are All rectangles are quadrilaterals? Explain.

Mathematics

2 answers:

nadezda [96]2 years ago

6 0

Answer:

yes because all rectangles have 4 sides

alisha [4.7K]2 years ago

6 0

Answer:

yes

Step-by-step explanation:

A quadrilateral is any polygon with four sides. Every rectangle is a quadrilateral because all rectangles must have four sides, which is the definition of a quadrilateral.

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When p is false and q is true, then p or q is _______ true

Anastaziya [24]

Answer:

sometimes

Step-by-step explanation:

always and never would not make sense since saying it is possible that it is true or false.

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2 years ago

Polygon ABCDE ~ Polygon FGHIJ What is the scale factor of polygon ABCDE to polygon FGHIJ?

Nataly [62]

Answer:

A. $\frac{1}{3}$

Step-by-step explanation:

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2 years ago

Recall that Rn denotes the right-endpoint approximation using n rectangles, Ln denotes the left-endpoint approximation using n r

pogonyaev

Answer:

$R_5=1.12$

Step-by-step explanation:

We want to calculate the right-endpoint approximation (the right Riemann sum) for the function:

$f(x)=x^2+x$

On the interval [-1, 1] using five equal rectangles.

Find the width of each rectangle:

$\displaystyle \Delta x=\frac{1-(-1)}{5}=\frac{2}{5}$

List the x-coordinates starting with -1 and ending with 1 with increments of 2/5:

-1, -3/5, -1/5, 1/5, 3/5, 1.

Since we are find the right-hand approximation, we use the five coordinates on the right.

Evaluate the function for each value. This is shown in the table below.

Each area of each rectangle is its area (the y-value) times its width, which is a constant 2/5. Hence, the approximation for the area under the curve of the function f(x) over the interval [-1, 1] using five equal rectangles is:

$\displaystyle R_5=\frac{2}{5}\left(-0.24+-0.16+0.24+0.96+2)= 1.12$