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lorasvet [3.4K]
3 years ago
13

How do I find a perimeter

Mathematics
2 answers:
adell [148]3 years ago
8 0

The perimeter is the total distance around the sides of a 2 dimensional shape. To calculate a perimeter, add up all the side lengths around the shape

Example:

2 by 5 rectangle

2 of the sides are 2 long

2 of the sides are 5 long

Add up the measures:

2 + 2 + 5 + 5 = 14

perimeter is 14

german3 years ago
5 0
By adding all of the numbers on the the outside lines
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triangle MNO is an equilateral triangle with sides measuring 16 units What is the height of the triangle?
fiasKO [112]

see the attached figure to better understand the problem

we know that

The equilateral triangle has three equal sides

so

in the equilateral triangle ABC

AB=BC=AC=16 units

the height of the triangle is the segment BD

in the right triangle BCD

Applying the Pythagorean Theorem

BC^{2} =BD^{2}+DC^{2}

solve for BD

BD^{2}=BC^{2}-DC^{2}

substitute the values

BD^{2}=16^{2}-8^{2}

BD^{2}=192

BD=\sqrt{192}\ units

therefore

<u>the answer is</u>

the height of the triangle is \sqrt{192}\ units


7 0
3 years ago
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What is the sine value of 7 pi over 6? negative square root 3 over 2 square root 3 over 2 negative 1 over 2 1 over 2?
djverab [1.8K]
First thing to do is to change the radians to degrees so it's easier to determine our angle and where it lies in the coordinate plane.  \frac{7 \pi }{6} * \frac{180}{ \pi }=210.  If we sweep out a 210 degree angle, we end up in the third quadrant, with a 30 degree angle.  In this quadrant, x and y are both negative, but the hypotenuse, no matter where it is, will never ever be negative.  So the side across from the 30 degree reference angle is -1, and the hypotenuse is 2, so the sine of this angle, opposite over hypotenuse, is -1/2
6 0
3 years ago
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You are making identical balloon arrangements for your family reunion. You have 42 maroon
galben [10]

Answer: 42 in all, 14 of each.

Step-by-step explanation

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8 0
2 years ago
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Out of 350 students, 315 went
larisa [96]

Answer:

350-315=35

(35÷350)×100

=10%

7 0
3 years ago
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What is the sum of the interior angles, each interior angle, the central angle, and each exterior angle of a pentagon, a hexagon
WITCHER [35]
<span>Sum of Interior Angles: Formula: (n-2) * 180
-Pentagon: 540</span>°<span>
-Hexagon: 720</span>°<span>
-Octagon: 900</span>°<span>
-Nonagon: 1260</span>°<span>
-Decagon: 1440</span>°<span>
-Dodecagon: 1800</span>°

Each interior Angle: Formula: [(n-2)*180] / n
-Pentagon: 108°
-Hexagon: 120°
-Octagon: 135°
-Nonagon: 140°
-Decagon: 144°
-Dodecagon: 150°

The sum of the exterior angles of each polygon stated above is equal to 360 degrees. Using the formula: (180-interior angle) * n

The central angle is formed by making a circle in the middle and divide it by the number of sides. Therefore, CA = 360 /n
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-Hexagon: 60°
-Octagon: 45°
-Nonagon: 40°
-Decagon: 36°
-Dodecagon: 30°

3 0
3 years ago
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