3 years ago

Which is a right angle?

Mathematics

1 answer:

lutik1710 [3]3 years ago

5 0

Answer:

Step-by-step explanation:

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Triangle A B C is shown. Angle A B C is 95 degrees and angle B C A is 45 degrees. The length of A B is c and the length of B C i

NARA [144]

Answer:

(B)c = StartFraction (3) sine (45 degrees) Over sine (40 degrees) EndFraction

$c=\dfrac{3 * \sin 45}{sin 40}$

Step-by-step explanation:

In Triangle ABC is shown.

$\angle A B C=$ 95 degrees

$\angle B C A =$ 45 degrees.

|AB|=c

|BC|=3.0 cm

$\angle A+\angle B+\angle C=180^\circ\\\angle A+95+45=180\\\angle A=180-140=40^\circ$

Using the Law of Sines

$\dfrac{a}{\sin A}=\dfrac{b}{\sin B}=\dfrac{c}{\sin C}$

$\dfrac{3}{\sin 40}=\dfrac{c}{\sin 45}\\\\$Cross multiply\\c*\sin 40 =3 * \sin 45\\\\c=\dfrac{3 * \sin 45}{sin 40}$

The correct option is B.

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3 years ago

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The first three terms of an arithmetic sequence are as follows

ozzi

Answer:

32 and 39

Step-by-step explanation:

The common difference d for the sequence is 7

1st term of the sequence a1 is 11.

4th (a4) and 5th (a5) term of the sequence are required

nth term of an arithmetic sequence an =a1+(n-1)d

a4=11+(4-1)7=32

a5=11+(5-1)7=39

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3 years ago

What is the most precise term for quadrilateral ABCD with vertices A(1,2) B(2,6) C(5,6) D(5,3)?

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Answer:

This is a kite!

Step-by-step explanation:

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For any three consecutive numbers, what can you say about odd numbers and even numbers?Explain

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Adding three consecutive odd or even numbers is the same as multiplying the middle value by 3

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If m∠EBF = 6x + 4 and m∠CBF = 7x – 2, find m∠EBF.

olganol [36]

Answer:

Step-by-step

I hope it's helped

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3 years ago

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