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2 years ago

Find the area of an octagon with a radius of 11 units. Round your answer to the nearest hundredth. NO LINKS

Mathematics

1 answer:

xeze [42]2 years ago

8 0

Answer:

342.24 units²

Step-by-step explanation:

The area of one of the 8 triangular sections of the octagon is ...

A = (1/2)r²·sin(θ) . . . . . where θ is the central angle of the section

The area of the octagon is 8 times that, so is ...

A = 8·(1/2)·11²·sin(360°/8) = 242√2

A ≈ 342.24 units²

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3 years ago

The midpoint of AB is M(3,1).If the coordinates of A are (8,4) what are the coordinates of B

gulaghasi [49]

Answer:

The coordinates of B are (-2 , 9)

Step-by-step explanation:

A (8, 4)

M (3 , -1)

To calculate a midpoint you have to add the corresponding coordinates of each point and divide them by 2

(Ax + Bx) / 2 = Mx

(8 + Bx) / 2 = 3

8 + Bx = 3 * 2

Bx = 6 - 8

Bx = -2

(Ay + By) / 2 = My

( -1 + By) / 2 = 4

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The coordinates of B are (-2 , 9)

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3 years ago

Why the product (−5)(−4) must be equal to 20.

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Answer:

Multiplying to negative numbers equals a positive answer.

Step-by-step explanation:

7 0

2 years ago

I need the mid point

Anestetic [448]

Answer:

$(14,\frac{-7}{2})$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Midpoint Formula: $(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})$

Step-by-step explanation:

Step 1: Define

Point (18, 13)

Point (10, -20)

Step 2: Find Midpoint

Simply plug in your coordinates into the midpoint formula to find midpoint

Substitute [MF]: $(\frac{18+10}{2},\frac{13-20}{2})$
Add/Subtract: $(\frac{28}{2},\frac{-7}{2})$
Divide: $(14,\frac{-7}{2})$

7 0

3 years ago

Read 2 more answers

If y varies directly as the square of x and y =12 when x=2 find the value of x when y = 108

telo118 [61]

y = 3(x^2)

108 = 3(x^2)

36 = x^2

x = 6

5 0

3 years ago