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4 years ago

On which triangle can the law of cosines be used to find the length of an unknown side? law of cosines: a2 = b2 + c2 – 2bccos(a)

2 answers:

7 0

A²=b²+c²-2bc Cos (a)
In this case , we can find the length of side a using the above cosine law.
If you are given the values of side b , c and angle a, then it is easy to calculate the length of side a.
To find side b,
b²=a²+c²-2ac Cos(b)
To find side c,
c²=b²+c²-2bc Cos (c)
Just the given values in the formula and get the length of the missing side. You can also find the missing angle using these formulas.

I hope this will help you.

lapo4ka [179]4 years ago

3 0

Answer:

It's B on edge

Step-by-step explanation:

I got it right

Also, to everyone who is mad at the first person who answered this, they probably don't have edge and the person who asked the question didn't give a picture. They did their best

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You and your friends decide to camp for one night. Look at the diagram of your tent below. It is drawn on 1 cm squared paper. Th

Citrus2011 [14]

Answer:

1.Area of Porch =2.5m²

2.Number of people =3 people

Step-by-step explanation:

The porch area from the diagram has a dimension of 4 units by 10 units

One units =1cm

Thus the porch is drawn with dimensions of 4cm by 10 cm

Taking length is 10 cm and width as 4 cm, convert these dimensions according to the scale.

The scale is 1cm=0.25m

The width will be= 0.25×4=1 m

The length will be=0.25×10= 2.5m

Area of the porch is given by the formula;

length×width because its has a shape of a rectangle

Area of porch will be

=1m ×2.5m =2.5m²

Find the dimensions of the tent

14 units by 10 units

Applying the scale on the dimensions by multiplying by 0.25

14×0.25=3.5m

10×0.25=2.5m

Width=2.5m

length=3.5m

Subtract the edge distance on both the length and width

Length will be=3.5-(0.25×2)=3.0m

Width will be=2.5-(0.25×2)=2.0m

Find the area remaining to be covered by the people while sleeping

=3.0×2.0=6m²

Area covered by sleeping bag and a ground mat

2m×1m=2m²

Number of people that can sleep in the tent

6m²÷2m²=3 people

8 0

4 years ago

Read 2 more answers

THE RIGHT ANSWERRRRRR

Mkey [24]

Area of semicircle = 1/2 the area of a circle:
$A_{sc}=\frac{1}{2} \pi r^{2}$
radius is half the diameter of 6ft.
$A_{sc} = \frac{1}{2} \pi (3^{2} )=14.13 ft^{2} .$
Area of the rectangle:
$A_{r} =lw=15*6=90 ft^{2} .$
Add the two together:
90 + 14.13 = 104.13
Round to the nearest tenth (one decimal place)
Area = 104.1 square feet.

4 0

4 years ago

Show me how to do this on paper i need it right now

postnew [5]

Answer:

Step-by-step explanation:

32 x 10 = 320

32 x 4 = 128

320 + 128 = 448

3 0

3 years ago

Read 2 more answers