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Ganezh [65]
4 years ago
14

The measure of an angle is twenty-nine times the measure of a complementary angle. what is the measure of each angle?

Mathematics
2 answers:
Alborosie4 years ago
8 0
Complementary angles add up to 90°

Let one of the angle be x.
The other angle is 29x.

x + 29x = 90
30x = 90
x = 3
29x = 29(3) = 87

Answer: The two angles are 3° and 87°
AleksandrR [38]4 years ago
6 0

Answer: Measure of angles are 3° and 87° respectively.

Step-by-step explanation:

Let the measure of angle be x.

Let the measure of its complementary angle be '29x'.

As we know that in case of complementary angles, sum of two angles must be equal to 90°.

According to statement, we get that

x+29x=90^\circ\\\\30x=90^\circ\\\\x=\dfrac{90}{30}\\\\x=3^\circ

So, Measure of angle would be 3° and the measure of its complementary angle would be 29\times 3=87^\circ

Hence, measure of angles are 3° and 87° respectively.

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In a right triangle ABC, CD is an altitude, such that AD=BC. Find AC, if AB=3 cm, and CD= 2 cm.
konstantin123 [22]

Consider right triangle ΔABC with legs AC and BC and hypotenuse AB. Draw the altitude CD.

1. Theorem: The length of each leg of a right triangle is the geometric mean of the length of the hypotenuse and the length of the segment of the hypotenuse adjacent to that leg.

According to this theorem,

BC^2=BD\cdot AB.

Let BC=x cm, then AD=BC=x cm and BD=AB-AD=3-x cm. Then

x^2=(3-x)\cdot 3,\\ \\x^2=9-3x,\\ \\x^2+3x-9=0,\\ \\D=3^2-4\cdot (-9)=9+36=45,\\ \\\sqrt{D}=\sqrt{45}=3\sqrt{5},\\ \\x_1=\dfrac{-3-3\sqrt{5} }{2}0.

Take positive value x. You get

AD=BC=\dfrac{-3+3\sqrt{5} }{2}\ cm.

2. According to the previous theorem,

AC^2=AD\cdot AB.

Then

AC^2=\dfrac{-3+3\sqrt{5} }{2}\cdot 3=\dfrac{-9+9\sqrt{5} }{2},\\ \\AC=\sqrt{\dfrac{-9+9\sqrt{5} }{2}}\ cm.

Answer: AC=\sqrt{\dfrac{-9+9\sqrt{5} }{2}}\ cm.

This solution doesn't need CD=2 cm. Note that if AB=3cm and CD=2cm, then

CD^2=AD\cdot DB,\\ \\2^2=AD\cdot (3-AD),\\ \\AD^2-3AD+4=0,\\ \\D

This means that you cannot find solutions of this equation. Then CD≠2 cm.

8 0
4 years ago
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Which number is equivalent to 17.02?<br> 17.020 , 17.22 , 17 , 17.002
Irina18 [472]

Answer:

Step-by-step explanation:

17.020

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3 years ago
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Answer:

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Step-by-step explanation:

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kobusy [5.1K]
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3 years ago
Use Lagrange multipliers to solve the following exercise. A home improvement contractor is painting the walls and ceiling of a r
mash [69]

Answer:

Let the width of the garden =x meter

Then length=(x+4) meter

Half perimeter =36 m

So perimeter of garden =(2×36)=72 meters

According to the question

⇒2(l+b)=72

⇒2(x+x+4)=72

⇒2x+2x+4=74⇒4x=64⇒x=16 meters

Hence,the width of the garden =16 meters

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