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3 years ago

14

How do I find the perimeter of a triangle?

2 answers:

olga nikolaevna [1]3 years ago

4 0

"Perimeter" is the distance all the way around it.

To find the perimeter of a triangle, collect these numbers:

-- length of one side
-- length of another side
-- length of the remaining side .

Add up those three numbers. Their sum is the perimeter of the triangle.

GuDViN [60]3 years ago

4 0

Perimeter is the distance around the object (in this case a triangle) and is found by adding up the length of each side

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Katarina [22]

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2 years ago

Abdul's gas tank is 1/5 full. After he buys 7 gallons of gas, it is 7/10 full. How many gallons can Abdul's tank hold?

eduard

Answer: 14 gallons

Step-by-step explanation:

Let's call the total gallons of gas Abdul's tank can hold <em>x</em>.

Then, based on the information given in the problem, you can write the following expression:

$\frac{1}{5}x+7=\frac{7}{10}x$

Therefore, when you solve for x, you obtain the following result:

$\frac{1}{5}x+7=\frac{7}{10}x\\\\\frac{1}{5}x-\frac{7}{10}x=-7\\\\-\frac{1}{2}x=-7\\\\-x=(-7)(2)\\x=14$

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3 years ago

The mean height of the students in Marta's class is 60 in. There are 18 students in her class. Write and Solve and equation to f

Mashcka [7]

Solution: Let x be the height of a student in Marta's class.

The mean height of 18 students in Marta's class is 60 inches

We know that:

$Mean = \frac{\sum x_{i}}{n}$

$60 = \frac{\sum x_{i}}{18}$

$60 \times 18 = \sum x_{i}$

$\sum x_{i} = 1080$

Therefore, the total measure of all 18 student's heights is 1080 inches

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3 years ago

The midpoint of AB‾AB is M(−4,−3)M(−4,−3). If the coordinates of A are (−1,-2)(−1,−2), what are the coordinates of B?

jonny [76]

Answer:

(-7, -4)

Step-by-step explanation:

The midpoint formula is expressed as;

M (X,Y) = {(x1+x2/2), (y1+y2)/2}

Given that M(-4, -3) and (x1, x2) = (-1, -2)

X = x1+x2/2

-4 = -1+x2/2

-8 = -1 + x2

x2 = -8 + 1

x2 = -7

SImilarly;

Y = y1+y2/2

-3 = -2+y2/2

-3*2 = -2+y2

-6 = -2 + y2

y2 = -6 + 2

y2 = -4

Hence the coordinate of B is (-7, -4)

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