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2 years ago

Does anyone know some basic geometry lol...I need help

Mathematics

2 answers:

Aloiza [94]2 years ago

8 0

Answer:

128.52

Step-by-step explanation:

to find the area of a triangle is base times height divided by two, so in this case you'd do six times six which is thirty six and divide it by two which equals eight.

to find the area of a rectangle you do base times height, here you'd do six times nine which is fifty four.

to find the area of a half circle you do pi radius squared and after that you get an answer of fifty six point five two

lastly you add all the numbers up - 18+54+56.52 = 128.52 and that should be your answer

hope this helps x

babymother [125]2 years ago

7 0

Answer:

The area of the figure is 86.13

Step-by-step explanation:

First, solve for the area in the triangle using the equation A = h*b/2

We have the height and the base which is 6. Plug in for the equation and solve.

A = 6*6/2

A = 36/2

A = 18

Next, solve the area for the rectangle using the equation A = w*l

The width is 6 and the length is 9. Plug in for the equation and solve.

A = 6*9

A = 54

And finally, solve for the area of the triangle using the equation A = pi*r^2

We know that pi is around 3.14 and the diameter is 6. We know that a diameter is twice the length of the radius, so we can divide the diameter by 2 and get the radius.

r = 6/2

r = 3

Now plug in the equation and solve.

A = 3.14*3^2

A = 3.14*9

A = 28.26

Since this is the area of a full circle, we need to divide the area of it by 2 to get the area of a half circle.

A = 28.26/2

A = 14.13

Next, add them all up and you will get your answer.

18 + 54 + 14.13 = 86.13

Hope this helps.

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Is this relation a function? explain

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3 years ago

Solve: (-5/6) × (9/20) + (-5/6) × 7/25 = ?

jonny [76]

$\bf \underline{★ How \:to\: do -} \\$

Here, we are given with four fractions to multiply two of them and to add two of them. If we add them directly by taking the LCM and adding them is not a similar way. We can clearly observe that in those four fractions, we have two fractions as common i.e, we have two fractions as same. If we have two fractions or numbers as same, we can solve the sum by an other concept called as distributive property. In this property, we multiply the common fraction with the sum of other two fractions. This concept can also be done with fractions as well as integers. So, let's solve!!

$\:$

$\bf \underline{➤ Solution-} \\$

${\tt \leadsto \dfrac{(-5)}{6} \times \dfrac{9}{20} + \dfrac{(-5)}{6} + \dfrac{7}{25}}$

Group the non-common fractions in bracket.

${\tt \leadsto \dfrac{(-5)}{6} \times \bigg( \dfrac{9}{20} + \dfrac{7}{25} \bigg)}$

First we should solve the numbers in bracket.

LCM of 20 and 25 is 100.

${\tt \leadsto \dfrac{(-5)}{6} \times \bigg( \dfrac{9 \times 5}{20 \times 5} + \dfrac{7 \times 4}{25 \times 4} \bigg)}$

Multiply the numerators and denominators in the bracket.

${\tt \leadsto \dfrac{(-5)}{6} \times \bigg( \dfrac{45}{100} + \dfrac{28}{100} \bigg)}$

Now, write both numerators in bracket with a common denominator.

${\tt \leadsto \dfrac{(-5)}{6} \times \bigg( \dfrac{45 + 28}{100} \bigg)}$

Now, add the numerators in bracket.

${\tt \leadsto \dfrac{(-5)}{6} \times \bigg( \dfrac{73}{100} \bigg)}$

Write the numerator and denominator in lowest form by cancellation method.

${\tt \leadsto \dfrac{\cancel{(-5)} \times 73}{6 \times \cancel{100}} = \dfrac{(-1) \times 73}{6 \times 20}}$

Now, multiply the numerators and denominators.

${\tt \leadsto \dfrac{(-73)}{120}}$

$\:$

${\red{\underline{\boxed{\bf So, \: the \: answer \: obtained \: is \: \: \dfrac{(-73)}{120}}}}}$

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lana66690 [7]

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5 0

3 years ago

a system of equations is shown below: equation a: 2c = d − 8 equation b: c = 3d 8 which of the following steps should be perform

Fofino [41]

If you would like to know which of the following steps should be performed to eliminate variable d first, you can find this using the following steps:

equation a: 2c = d - 8 /*(-3)
equation b: c = 3d + 8
__________________
-6c = -3d + 24
c = 3d + 8
__________________
-6c + c = -3d + 24 + 3d + 8
-5c = 32
5c = -32
c = -32/5

<span>The correct result would </span>be: <span>multiply equation a by −3.</span>

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4 years ago