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raketka [301]
3 years ago
10

Which relationship in the triangle must be true?

Mathematics
1 answer:
Paul [167]3 years ago
7 0

We'll assume this is an arbitrary triangle ABC.


A) No, the sines of two different angles can be whatever they want


B) sin(B)=cos(90-B)


Yes, that's always true. The "co" in cosine means "complementary" as in the complementary angle, which adds to 90. So the sine of an angle is the cosine of the complementary angle.


C) No, the correct identity is sin(180-B)=sin B. Supplementary angles share the same sine.


D) Just like A, different triangle angles often have different cosines.


Answer: Choice B



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HELP PLEASE <br> What is the area of the kite below?
Kryger [21]

Answer:

Area = 33 inches squared

Step-by-step explanation:

The formula for the area of a kite is:

Area = ½ × (d)1 × (d)2

To find the first diagonal (d1):

d1 = 7 in + 4 in = 11 in

To find the second diagonal (d2):

The triangles on the right of the kite must be 3 4 5 triangle since it is a right triangle with a hypotenuse of 5 and a side of 4, we know half of a diagonal would be 3 inches.

d2 = 3 in + 3 in = 6 in

Now we can plug the diagonals into the area formula.

Area = ½ × 11 × 6 = 33 inches squared

6 0
2 years ago
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On a coordinate plane, the coordinates of vertices R and T for a polygon are R (-7,3) and T (3,3). What is the length of side RT
Hitman42 [59]
Check the picture below.  You can pretty much just count the units off the grid.

3 0
3 years ago
Please help me with this
GREYUIT [131]

Ths phrase that represents the algebraic expression (3p + 6)/(7p - 9) will be D. the sum of three times a number and six divided by the difference of seven times the number and nine.

<h3>How to illustrate the algebra?</h3>

It should be noted that an algebra is simply used to show the relationship between variables.

Here, the phrase that represents the algebraic expression (3p + 6)/(7p - 9) will be the sum of three times a number and six divided by the difference of seven times the number and nine.

In conclusion, the correct option is D.

Learn more about algebra on:

brainly.com/question/723406

#SPJ1

7 0
2 years ago
Solve for the indicated variable. include all of your work in your answer. submit your solution. c = 2r; for r
Aliun [14]
I believe yo meant c=2pir but ok

c=2r
divide both sides by 2
c/2=r

if you forgot tthe pi
c=2pir
divide by 2pi
c/(2pi)=r
7 0
3 years ago
1) 3x – 2y=-16<br> Write the slope-intercept form of the equation of each line
raketka [301]

Answer:

y = \frac{3}{2} x + 8

Step-by-step explanation:

The equation of a line in slope- intercept gorm is

y = mx + c

Given

3x - 2y = - 16 ( subtract 3x from both sides )

- 2y = - 3x - 16 ( divide all terms by - 2 )

y = \frac{3}{2} x + 8 ← in slope- intercept form

7 0
3 years ago
Read 2 more answers
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