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galina1969 [7]
3 years ago
7

How many centimeters make up a triangle.

Mathematics
1 answer:
Eva8 [605]3 years ago
3 0

Answer:

120cm

Step-by-step explanation:

A triangle has a perimeter of 120 cm and two sides of 30 cm and 40 cm. Calculates the area. A right triangle has a cathetus of 10 cm and the hypotenuse 26 cm.

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Consider the right triangle below. Solve for x. Label the sides in the image as opposite, adjacent, or hypotenuse, then show you
jasenka [17]
<h3>Answer:   x = 19.7  (choice C)</h3>

=========================================================

Explanation:

The reference angle is 24 degrees. Opposite that angle is the side 8 units long. The horizontal portion is unknown and it's the adjacent side.

Also unknown is the value of x which is the hypotenuse.

To summarize:

  • opposite = vertical leg = 8
  • adjacent = horizontal leg = unknown
  • hypotenuse = x

The hypotenuse is always opposite the 90 degree angle.

To tie together the opposite and hypotenuse, we'll use the sine ratio

sin(angle) = opposite/hypotenuse

sin(24) = 8/x

x*sin(24) = 8

x = 8/sin(24)

x = 19.6687 approximately

x = 19.7 after rounding to the nearest tenth.

Side note: your calculator needs to be in degree mode

3 0
2 years ago
Which guation is represented by the graph?
Arturiano [62]

Answer:

The First One

Step-by-step explanation:

Try to substitute x by zero for example

(the minus will gone by zero)

You will get y = +2

and the graph you see the y =+2 !!

I hope that it's a clear solution and explanation.

5 0
3 years ago
Solve this problem, which steps would you take? Include any theorems, definitions, or reasons that explain the steps. Make sure
posledela

Answer:

∠A=123°.

Step-by-step explanation:

From the given figure it is clear the CD and CE are two tangent lines on circle with center A.

Radius is perpendicular to the tangent at the point of tangency.

\angle ADC=90^{\circ}

\angle AEC=90^{\circ}

Smaller arc DE = (5x-2)°

It means central angle DAE is (5x-2)°.

\angle DAE=(5x-2)^{\circ}

Now, ADCE is a quadrilateral and sum of all angles of a quadrilateral is 360 degrees.

\angle ADC+\angle DCE+\angle AEC+\angle DAE=360^{\circ}

90^{\circ}+(2x+7)^{\circ}+90^{\circ}+(5x-2)^{\circ}=360^{\circ}

(7x+5)^{\circ}+180^{\circ}=360^{\circ}

(7x+5)^{\circ}=360^{\circ}-180^{\circ}

(7x+5)^{\circ}=180^{\circ}

7x+5=180

7x=175

x=25

The value of x is 25.

\angle A=5x-2=5(25)-2=125-2=123^{\circ}

Therefore, the measure of ∠A is 123°.

6 0
3 years ago
Beth won 86 pieces of gum playing hoops at her school’s game night. Later, she gave three to each of her friends. She only has 2
algol [13]

Answer:

That's a very dumb question, because some of her friends could be fakers and users. But, I'll answer it.

86 subtracted by 2 is 84.

It says she gave 3 to each friend so:

84 divided by 3 is 28.

She has 28 friends.

3 0
3 years ago
Part A
Kitty [74]

Answer:

Flat fee of 20 dollars with 5 dollaers every hour=

20+h5

Step-by-step explanation:

8 0
3 years ago
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