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Sunny_sXe [5.5K]
3 years ago
5

Find the area of triangle PQR if PQ = QR = 12 and angle PQR = 120

Mathematics
1 answer:
Leona [35]3 years ago
3 0

Answer:

36√3 unit square

Step-by-step explanation:

A=1/2(ab)sin120

A=1/2(12*12) sin120

A=72*√3/2=36√3 unit square

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Describe the effect on the area of a circle when the radius is doubled
galina1969 [7]

Answer:

The original area would be multiplied by the scale factor of 2² to get the new area.

Step-by-step explanation:

If you double the radius lets so lets do an example

(a=πr²) so

if x is the radius the area would be x²π      

double the radius so 2x then the area would be

(2x)²π so 4x²π

4x²π/x²π= 4 so its 4 times greater or

D the last answer or The original area would be multiplied by the scale factor of 2² to get the new area.

5 0
3 years ago
Help please ill give extra to brainliest<br> 13d +8= -1<br><br> d=?
arsen [322]

Answer:

d = (-9/13)

Step-by-step explanation:

13d + 8 = -1

       -8     -8

13d = -9

÷13    ÷13

d = ( -9/ 13 )

I hope this helps!

8 0
2 years ago
Read 2 more answers
Find the value of X<br><br>A: 2<br>B: 4<br>C: 6<br>D: 8​
11111nata11111 [884]

Using the Pythagorean theorem:

x^2 + (x-2)^2 = (√20)^2

Simplify the right side:

x^2 + (x-2)^2 = 20

Subtract 20 from both sides:

x^2 + (x-2)^2 - 20 = 0

Factor:

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Solve for each x:

x = 4 and x = -2

The side cant be a negative value, so the answer would be x = 4

The answer is B.

3 0
3 years ago
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astraxan [27]

Answer:

\large\boxed{D.\ \dfrac{8}{9}}

Step-by-step explanation:

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6 0
3 years ago
3. Order the rational numbers from least to greatest:<br> 0.5, 0, - 1.5, 1, -0.5, -1
harina [27]

Answer:

-1.5,-1,0,0.5,1 is the answer

8 0
2 years ago
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