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8_murik_8 [283]
4 years ago
7

How do you find the area of a triangle?

Mathematics
1 answer:
Igoryamba4 years ago
8 0

Answer:

  it depends on what data you start with

Step-by-step explanation:

The usual formula for the area of a triangle is ...

  A = (1/2)bh

where b represents the base length of the triangle, and h represents the altitude to that base (the height).

__

If you are given two side lengths, a and b, and the angle C between them, the area can be found using the formula ...

  A = (1/2)ab·sin(C)

__

If you are given the three side lengths, a, b, c, then the area can be found using Heron's formula:

  A = √(s(s -a)(s -b)(s -c))

where s is the semi-perimeter: s = (a+b+c)/2.

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astraxan [27]

The answer is:


300.000


7 0
3 years ago
Read 2 more answers
Solve by completing the square :<br><br> 4x^2-12x+7=0
Amiraneli [1.4K]

Answer:

x=\frac{3}{2}\pm\frac{\sqrt{2}}{2}}

Step-by-step explanation:

we have

4x^2-12x+7=0

step 1

Group terms that contain the same variable, and move the constant to the opposite side of the equation

4x^2-12x=-7

step 2

factor the leading coefficient

4(x^2-3x)=-7

step 3

Complete the square. Remember to balance the equation by adding the same constants to each side

4(x^2-3x+1.5^2)=-7+1.5^2(4)

4(x^2-3x+2.25)=2

simplify

(x^2-3x+2.25)=0.5

step 4

Rewrite as perfect squares

(x-1.5)^2=0.5

step 5

take square root both sides

x-1.5=\pm\frac{1}{\sqrt{2}}

Convert 1.5 in a fraction number

x-\frac{3}{2}=\pm\frac{1}{\sqrt{2}}

x=\frac{3}{2}\pm\frac{\sqrt{2}}{2}}

3 0
3 years ago
Multiply and simplify. A) 36 1/12 B) 36 1/6 C) 41 1/12 or D) 41 1/6
Scorpion4ik [409]
1 Convert 12\frac{2}{3}12
​3
​
​2
​​ to improper fraction. Use this rule: a \frac{b}{c}=\frac{ac+b}{c}a
​c
​
​b
​​ =
​c
​
​ac+b
​​
\frac{12\times 3+2}{3}\times 3\frac{1}{4}
​3
​
​12×3+2
​​ ×3
​4
​
​1
​​

2 Simplify 12\times 312×3 to 3636
\frac{36+2}{3}\times 3\frac{1}{4}
​3
​
​36+2
​​ ×3
​4
​
​1
​​

3 Simplify 36+236+2 to 3838
\frac{38}{3}\times 3\frac{1}{4}
​3
​
​38
​​ ×3
​4
​
​1
​​

4 Convert 3\frac{1}{4}3
​4
​
​1
​​ to improper fraction. Use this rule: a \frac{b}{c}=\frac{ac+b}{c}a
​c
​
​b
​​ =
​c
​
​ac+b
​​
\frac{38}{3}\times \frac{3\times 4+1}{4}
​3
​
​38
​​ ×
​4
​
​3×4+1
​​

5 Simplify 3\times 43×4 to 1212
\frac{38}{3}\times \frac{12+1}{4}
​3
​
​38
​​ ×
​4
​
​12+1
​​

6 Simplify 12+112+1 to 1313
\frac{38}{3}\times \frac{13}{4}
​3
​
​38
​​ ×
​4
​
​13
​​

7 Use this rule: \frac{a}{b}\times \frac{c}{d}=\frac{ac}{bd}
​b
​
​a
​​ ×
​d
​
​c
​​ =
​bd
​
​ac
​​
\frac{38\times 13}{3\times 4}
​3×4
​
​38×13
​​

8 Simplify 38\times 1338×13 to 494494
\frac{494}{3\times 4}
​3×4
​
​494
​​

9 Simplify 3\times 43×4 to 1212
\frac{494}{12}
​12
​
​494
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10 Simplify
\frac{247}{6}
​6
​
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11 Convert to mixed fraction
41\frac{1}{6}41
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41 and 1/6
4 0
3 years ago
Plz, answer the question in the photo.
OleMash [197]

Answer:

1/8 is your answer

4 0
3 years ago
How would you calculate the area and perimeter of 3yd 6yd 5yd 10yds
spayn [35]
Okay, start with the smaller square, you know the side length is 3 and that the width is 5, multiply this together:
3 * 5 = 15

That's the smaller left side of this shape, now the bigger side, divide the 10 yards at the bottom by 2 to properly represent the other side then multiply this by the 6 over there.
5 * 6 = 30

Conclusion for Area: After adding the results the answer should be 45.

The perimeter is solely adding all the sides together. You have a 10, two 5's, one 6, and two 3's. Add this together:

10 + 5 + 5 + 6 + 3 + 3 = 32

Conclusion for Perimeter: So the perimeter would be 32.

I hope this helps in someway, have a great rest of your day! ^ ^
| | Ghostgate | |
3 0
3 years ago
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