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lilavasa [31]
3 years ago
10

A certain triangle has 30° ange 60° angle. Which must be a true statement about the triangle?

Mathematics
1 answer:
olga2289 [7]3 years ago
4 0

Answer:

The triangle is a right triangle since its a 90 degree triangle

Step-by-step explanation:

30+60=90

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Find the approximate length of EF.
Yuri [45]

Answer:

The correct option is B

Step-by-step explanation:

Given information: ∠F=32°,∠D=54° and DF=18m.

According to the angle sum property of triangle, the sum interior angles of a triangle is 180°.

Using angle sum property, we get

\angle D+\angle E+\angle F=180^{\circ}

54^{\circ}+\angle E+32^{\circ}=180^{\circ}

\angle E+86^{\circ}=180^{\circ}

\angle E=180^{\circ}-86^{\circ}

\angle E=94^{\circ}

Law of sine:

\frac{\sin A}{a}=\frac{\sin B}{b}=\frac{\sin C}{c}

Using law of sine we get

\frac{\sin D}{d}=\frac{\sin E}{e}

\frac{\sin D}{EF}=\frac{\sin E}{DF}

\frac{\sin 54^{\circ}}{EF}=\frac{\sin 94^{\circ}}{18}

\frac{0.809016994375}{EF}=\frac{0.99756405026}{18}

Cross multiply,

0.809016994375\times 18=0.99756405026\times EF

Divide both sides by 0.99756405026.

EF=14.5978655656

EF\approx 14.6

The value of EF is 14.6 m. Therefore the correct option is B.

7 0
3 years ago
If 150 students ware red and 250 students dont. what percentage of students wore red​
Anettt [7]

# of students who wore red = 150

# of students who did not wear red = 250

Total #. of students = 150 + 250

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Percentage of students who wore red =

(# of students who wore red/Total #) * 100 = (150/400) * 100 = 37.5

∴ No of students who wore red = 37.5%

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4 years ago
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Just find the button to ask a question. Search around for it.

Step-by-step explanation:

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1/10 is the fraction

Step-by-step explanation:

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antoniya [11.8K]
45 is different fro 738 just subtract
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4 years ago
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