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poizon [28]
3 years ago
7

How do you calculate the area and the perimeter of a parallelogram and a triangle?

Mathematics
2 answers:
Mnenie [13.5K]3 years ago
7 0

for parallelograms:

area = b(h)

so basically, the length times the height. just like how you would find the area of a square.

perimeter: just add all of the sides together.

for triangles:

area = 1/2(b) x h

so half the length multiplied by the height. for example, if the length was 4, you have to use half of that. so that means 2 times whatever the height is.

perimeter: again, just add all three sides together

Cloud [144]3 years ago
7 0

For the area of a parallelogram, you must use the formula : base x height

First you figure the height of the shape, and then only multiply that by the base, giving you the area.

For the perimeter, you could find the height, and use pythagoras' theorem to help you find the missing lengths if there are any, and add all sides up.

For the area of a triangle, you must use the formula : (Base x Height) / 2

Simply just by dividing the base by two and multiplying that by the height, of which you could also find with Pythagoras' Theorem if it isn't shown, or just multiply both height and base and diving the product by two.

For the perimeter, use pythagoras' theorem if needed: a^2 + b^2 = c^2

Add all sides up

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A small radio transmitter broadcasts in a 69 mile radius. If you drive along a straight line from a city 93 miles north of the t
larisa86 [58]

Answer:

See Explanation

Step-by-step explanation:

According to the Question,

  • We have A small radio transmitter that broadcasts in a 69-mile radius. If you drive along a straight line from a city 93 miles north of the transmitter to a second city 78 miles east of the transmitter.

Thus,

The distance that you get reception is the length of the chord created by the intersection of the circle defining the edge of transmission and the line defining the car trip.

  •  x2 + y2 = 69²               this is the circle

And,

The Transmitter at the origin

City to the north at (0,93)  & City to the east at (78,0)  

the Slope is M=(-93/78)

Intercept is B= y - mx ⇒  93 - (-93/78)(0) = 93

The equation of the line between the cities is y = (-93/78)x + 93

  • y = -93x/78 + 93           this is the line

Now, Solve the above two Equations

The intersection is gotten from the picture or solving:

x^2 + [(-93/78)*x + 93]^2 = 69^2

  • on solving we get, the points approximately are: (67.952,11.98 ) and (23.6277, 64.82)

Now,

From the Pythagorean theorem the total distance of the trip is:  

d1 = √(93^2 + 78^2) ≈ 121.37miles  

And the distance when the signal is picked up is:

d2 =√ [(67.952-23.627)^2 + (64.82 - 11.98)^2] ≈ 68.96 miles

You will pick up a signal from the transmitter in (d2/d1)*100 = 56% of the drive.

3 0
3 years ago
How do you solve this
e-lub [12.9K]

Answer:


Step-by-step explanation:


6 0
3 years ago
How long would it to drive 8.5 miles at 22 miles mile per hour?
Vitek1552 [10]
Time = Distance / Speed     
T = 8.5 miles/ 22 miles = 0.3863

4 0
3 years ago
2 ÷ 4⁄5 no work needed
kodGreya [7K]
The answer to this question is :
2 1/2
7 0
3 years ago
Read 2 more answers
Passes through(4,7)Slope=2
Anna71 [15]

Answer:

Step-by-step explanation:

Slope = 2 and passes point (4,7)

The equation is y - y1 = m(x - x1)

And y1 = 7 while x1 = 4, m = 2

: - y - 7 = 2(x - 4)

y - 7 = 2x - 8

y = 2x - 8 + 7

y = 2x - 1 this is the equation

7 0
3 years ago
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