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3 years ago

What is the measure of angle abc

Mathematics

1 answer:

GalinKa [24]3 years ago

5 0

Answer:

Step-by-step explanation:

Add them all together to get your answer

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Three of the expressions will give the amount that remains after t years of a certain radioactive substance. Which expression is

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3 years ago

Can u help me I have 2 minutes to do this

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0.2, 0.6,0.25,0.75,0.82

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3 years ago

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Tony walks 1/3 of a mile to school each day. He also walks home from school. How many miles will he have walked in one five-day

djyliett [7]

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<h2> 3 1/3 miles per five day week</h2>

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2 years ago

There are six bottles of juice for the same size and we need to make each kid have a 1/3 of a bottle how many kids will there be

solmaris [256]

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Step-by-step explanation:

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3 years ago

From a point A that is 8.20 m above level ground, the angle of elevation of the top of a building s 31 deg 20 min and the angle

Mariulka [41]

Answer:

30.11 meters ( approx )

Step-by-step explanation:

Let x be the distance of a point P ( lies on the building ) from the top of the building such that AP is perpendicular to the building and y be the distance of the building from point A, ( shown in the below diagram )

Given,

Point A is 8.20 m above level ground,

So, the height of the building = ( x + 8.20 ) meters,

Now, 1 degree = 60 minutes,

⇒ $1\text{ minute } =\frac{1}{60}\text{ degree }$

$20\text{ minutes }=\frac{20}{60}=\frac{1}{3}\text{ degree}$

$50\text{ minutes }=\frac{50}{60}=\frac{5}{6}\text{ degree}$

By the below diagram,

$tan ( 12^{\circ} 50') = \frac{8.20}{y}$

$tan(12+\frac{5}{6})^{\circ}=\frac{8.20}{y}$

$tan (\frac{77}{6})^{\circ}=\frac{8.20}{y}$

$\implies y=\frac{8.20}{tan (\frac{77}{6})^{\circ}}$

Now, again by the below diagram,

$tan (31^{\circ}20')=\frac{x}{y}$

$tan(31+\frac{1}{3})=\frac{x}{y}$

$\implies x=y\times tan(\frac{94}{3})=\frac{8.20}{tan (\frac{77}{6})^{\circ}}\times tan(\frac{94}{3})^{\circ}=21.9142943216\approx 21.91$

Hence, the height of the building = x + 8.20 = 30.11 meters (approx)

8 0

3 years ago