The perimeter of an equilateral triangle is 21.33 centimeters. What is s, the length of each side of the triangle.

Mathematics

1 answer:

crimeas [40]3 years ago

8 0

Answer: Each side of the triangle equals 7.11 centimeters

Step-by-step explanation: The question states that what we have is an equilateral triangle. That’s a triangle with all three sides equal. Having that in mind, if one side measures 2cm for example, then the other two sides measure 2cm as well. Hence if one side of the equilateral triangle measures x (the dimensions are still unknown), then the other two sides each measure x as well. If the perimeter of the triangle is given as 21.33 cm, and each side of the equilateral triangle is x, then

x + x + x = 21.33

3x = 21.33

Divide both sides of the equation by 3

x = 7.11

Therefore, each side of the equilateral triangle equals 7.11 cm

You might be interested in

Answer the question in the picture

Svet_ta [14]

<h3>Answer:</h3>

left picture (bottom expression): -cot(x)
right picture (top expression): tan(x)

<h3>Step-by-step explanation:</h3>

A graphing calculator can show you a graph of each expression, which you can compare to the offered choices.

_____

You can make use of the relations ...

... sin(a)+sin(b) = 2sin((a+b)/2)cos((a-b)/2)

... cos(a)+cos(b) = 2cos((a+b)/2)cos((a-b)/2)

... cos(a)-cos(b) = -2sin((a+b)/2)sin((a-b)/2)

Then you have ...

$\dfrac{\cos{2x}-\cos{4x}}{\sin{2x}+\sin{4x}}=\dfrac{2\sin{3x}\sin{x}}{2\sin{3x}\cos{x}}=\dfrac{\sin{x}}{\cos{x}}=\tan{x}$

and ...

$\dfrac{\cos{2x}+\cos{4x}}{\sin{2x}-\sin{4x}}=\dfrac{2\cos{3x}\cos{x}}{-2\cos{3x}\sin{x}}=\dfrac{-\cos{x}}{\sin{x}}=-\cot{x}$

6 0

4 years ago

Write an equivalent fraction for 10/2

Scorpion4ik [409]

10/2 is an improper fraction. So, change it to a mixed number. 10÷2=5

5 is the mixed number and is the equivalent fraction. You can also do 5/1 which is also equivalent.

7 0

3 years ago

Grade 10 quick maffs pls help

kolezko [41]

You’re answer would be B (-6, 1) (-1, -1)

3 0

3 years ago

Read 2 more answers

What is the smallest number which is one less than twice its reciprocal?

notka56 [123]

Answer:

The smallest number is x = -2