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nadya68 [22]
2 years ago
8

Please help me it is due soon, please no links

Mathematics
1 answer:
lora16 [44]2 years ago
6 0

Answer:

The length of the three sides 5, \sqrt{58} , \sqrt{65}

The triangle <u>is not</u> a right triangle

Step-by-step explanation:

A = (3, 2) , B = ( 6, 9) , C = (10, 6)

Find the lengths using distance formula.

distance = \sqrt{(x_2 -x_1)^2 + (y_2 - y_1)^2}

AB = \sqrt{(6-3)^2 + (9-2)^2}  = \sqrt{9 + 49 } = \sqrt{58}

BC = \sqrt{(10-6)^2 + (6-9)^2}  = \sqrt{16 + 9}  = \sqrt{25}  = 5

AC = \sqrt{(3-10)^2+(2-6)^2}  = \sqrt{49 + 16} = \sqrt{65}

Using Pythagoras theorem :

(Longer \ side)^2 = sum \ of \ square \ of \ two \ other \ sides

Longest side is AC . So we will check if it satisfies Pythagoras theorem :

\sqrt{65} = \sqrt{58} + 5^2\\65 = 58 + 25\\

65 ≠ 58 + 25

So the sides does not satisfy Pythagoras theorem. Hence the triangle is not a right triangle.

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Two regular pentagons have areas of 20 mm² and x² - x mm². What values of x make the pentagons congruent?
Aleksandr-060686 [28]

<u>Answer</u>

5 and -4


<u>Explanation</u>

If the two triangle are congruent then they have the same area.

20 = x² - x

x² - x - 20 = 0

x² - x + (1/2)² = 20 + (1/2)²

(x - 1/2)² = 20.25

x - 1/2 = √20.25

x - 1/2 = 4.5                             or    x - 1/2 = - 4.5

x = 4 1/2 + 1/2                                      x = -4 1/2 + 1/2

   = 5                                                      = -4

The values of x are 5 and -4.



8 0
3 years ago
What is the simplest form of the fraction 45/50?
m_a_m_a [10]

Answer:

9/10

Step-by-step explanation:

4 0
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What is 11/15 divided by 1/5
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Step-by-step explanation:

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avanturin [10]

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8 0
3 years ago
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9/5 miles in 1 hour

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