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3 years ago

How many sides are on a triangle?

2 answers:

6 0

There are 3 sides. If you draw out a triangle, each line is a separate side (a line segment connecting 2 vertices, or points). You can also see in the word "triangle" the prefix "tri-", meaning "three". It refers to the shape having 3 angles, but when there are 3 angles there are 3 sides to make it up. This is true for other shapes too - in a square, there are 4 sides connecting 4 points, and between each side is an angle, creating 4 angles.

omeli [17]3 years ago

6 0

Answer:

Three

Step-by-step explanation:

A triangle is a 2-D figure having three sides, three vertices , and three angles formed in it.

The sum of all the three angles in a triangle is 180°

Also, Area of a triangle = $\frac{1}{2}*base*altitude$

Altitude is the perpendicular height of a triangle from the base of it

Perimeter of a triangle= Sum of length of all its three sides

In a right angled triangle the Pythagoras Theorem can be applied to find its third side if two are given:

(Length of Hypotenuse)²=(Length of Base)²+(Length of Perpendicular)²

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the circumference of the great circle of a sphere is 12 pi inches. Which of the following expressions can be used to approximate

andriy [413]

It would be A because with volume you would have your 12 to the 3rd power then multiply it by pie which is 3.14 then for sphere you would then multiply what ever you got after multiplying 12 to the 3rd power then by 3.14 to the 4/3

4 0

3 years ago

Solve the proportion.<br><br> s+1/4 = 4/8<br> s=

LUCKY_DIMON [66]

Answer:

8 = 16

Step-by-step explanation:

1/4 = 4 /8

Cross multiply:

1 * 8 = 4 * 4

Simplifying

1 * 8 = 4 * 4

Multiply 1 * 8

8 = 4 * 4

Multiply 4 * 4

8 = 16

Solving

8 = 16

3 0

3 years ago

Subtract. Use models if needed.<br><br><br> (12x + 3) – (2x + 10)

Galina-37 [17]

1.)combine like terms: 12-2x=10x 3-10=-7

10x-7

4 0

2 years ago

Read 2 more answers

A rectangular yard is 20 feet by 15 feet. The yard Is covered with grass except for an 8.5 feet. Square flower garden. How much

stich3 [128]

Answer: $227.75\ ft^2$

Step-by-step explanation:

<h3> The complete exercise is: "A rectangular yard is 20 ft by 15 ft. The yard is cover with grass except for 8.5 feet square flower garden. How much grass is in the yard?"</h3><h3 />

The area of a rectangle can be calculated with the following formula:

$A=lw$

Where "l" is the lenght of the rectangle and "w" is the width.

Based on the data given in the exercise, you can identify tha the length and the width of the rectangular yard are:

$l=20\ ft\\\\w=15\ ft$

Then, you can substitute these values into the formula and then evaluate in order to find the area of the entire yard:

$A_y=(20\ ft)(15\ ft)=\\\\A_y=300\ ft^2$

The area of the flower garden which is an square, can be calculated with this formula:

$A=s^2$

Where "s" is the side length.

In this case you know that:

$s=8.5\ ft$

Then the area of the flower garden is:

$A_g=(8.5\ ft)^2\\\\A_g=72.25\ ft^2$

<em> </em>Since this is not covered with grass, you need to subtract both areas calculated above in order to find the surface covered with grass in the yard.

This is:

$A_g=300\ ft^2-72.25\ ft^2\\\\A_g=227.75\ ft^2$

4 0

3 years ago

What is the mean of 31, 29, 33, 37, 33, 38, 43 and 40?

horsena [70]

Answer: 35.5

Step-by-step explanation: The mean of a data set is equal to the sum of the set of numbers divided by how many numbers are in the set.

So to find the mean of the data set shown here, let's begin by adding the numbers.

31 + 29 + 33 + 37 + 33 + 38 + 43 + 40 = 284

284 will be divided by how many numbers are in the data set which is 8 so we have to divide 284 by 8.

248 ÷ 8 = 35.5

Therefore, the mean of the data set shown here is 35.5.

6 0

3 years ago