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Orlov [11]
3 years ago
7

The perimeter of an equalatrial triangle is 60 cm find its area

Mathematics
2 answers:
lesya692 [45]3 years ago
6 0

Step-by-s:

EL PERÍMETRO DE UN TRIÁNGULO ES LA SUMA DE SUS LADOS Y EL

TRIÁNGULO EQUILÁTERO TIENE SUS 3 LADOS IGUALES Y DE ESTO

SE ENCUENTRA LA LONGITUD DE CADA UNO DE SUS LADOS.

L = 60 cm/3 = 20 cm

AHORA SE CONSIDERA COMO SI FUERA UN TRIÁNGULO RECTÁNGULO.

DESPUÉS SE DESPEJA EL TEOREMA DE PITÁGORAS PARA ENCONTRAR

LA ALTURA.

<em>h</em> = \sqrt{(20 cm)^{2} - (10 cm)^{2}} = 17.32 cm^{2}

LUEGO SACAMOS EL ÁREA DEL TRIÁNGULO EQUILÁTERO COMPLETO.

<em>A</em> = 20 cm(20 cm)/2 = 200 cm^{2}

miskamm [114]3 years ago
4 0

Answer:

173.21cm^2

Step-by-step explanation:

A=\frac{\sqrt{3} }{4} a^2\\P=3a\\

Solve for A

A=\sqrt{3} \frac{P^2}{36} \\=\sqrt{3} *\frac{60^2}{36} \\=173.21cm^2

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Find a point- slope form for the line with slope 1/5 and passing through the point (-4,-6)
weeeeeb [17]

Answer: y-(-6)=1/5(X-(-4))

Step-by-step explanation:

to put together a point slope expresion the equation would be y-y1=m(x-x1)

y1 and x1 being the points on the line and (m) being the slope

8 0
3 years ago
If it takes 90 minutes to wait in line to purchase 12 eggs, how many eggs could you purchase if you waited 120 minutes?
AlekseyPX

Answer:

16 eggs

Step-by-step explanation:

we know that

it takes 90 minutes to wait in line to purchase 12 eggs

so

using proportion

Find out how many eggs could you purchase if you waited 120 minutes

\frac{90\ min}{12\ eggs}=\frac{120\ min}{x\ eggs}\\\\x=12(120)/90\\\\x= 16\ eggs

8 0
4 years ago
David is building a rectangular fence around his garden. The short side is 15 meters and the long side is double that amount. Wh
Elenna [48]

Solution:

<u>Note that:</u>

  • Side₁ (Short side) = 15 meters
  • Side₂ (Longer side) = 2(15) = 30 meters
  • Perimeter = 2L + 2B

<u>Substituting the values into the expression:</u>

  • 2L + 2B
  • => 2(15) + 2(30)
  • => 30 + 60
  • => 90 m

The perimeter of the garden fence is 90 meters.

8 0
3 years ago
Which situation below correctly represents the algebraic expression 4 + 5g? A. Nikki has 4 sticks of gum and Breanne has 5 times
zhenek [66]

Answer:

C

Step-by-step explanation:

The 4 is the base price. Paying 5g or $5 per game is the add on

7 0
3 years ago
How do you work out 2/3 of 15? 4/5? of 20? 1/5 of 85? 1/8 of 96 2/5 of 65? 3/5 135? 4/5 of 200? 3/10 of 30? 3/10 of 25?
solniwko [45]

Answer:

Take your numerator times the whole number, then divide by the denominator. For example,

2x15= 30

30/3= 10

2/3 of 15 would be 10


8 0
3 years ago
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