The picture shows a triangular island:

A right triangle is shown with an acute angle equal to 55 degrees. The length of the side of the triangle opposite to the acute angle is r. The length of the side of the triangle adjacent to the acute angle is s. The length of the hypotenuse is q.

Which expression shows the value of q?

Respuesta :

Answer:

The expressions that show the value of q are

1) [tex]q=\sqrt{r^{2}+s^{2}}[/tex]

2) [tex]q=\frac{s}{cos(55\°)}[/tex]

3) [tex]q=\frac{r}{sin(55\°)}[/tex]

4) [tex]q=\frac{s}{sin(35\°)}[/tex]

5) [tex]q=\frac{r}{cos(35\°)}[/tex]

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

case A)

In the right triangle of the figure

Applying the Pythagoras Theorem

[tex]q^{2}=r^{2}+s^{2}[/tex]

[tex]q=\sqrt{r^{2}+s^{2}}[/tex]

case B)

In the right triangle of the figure

[tex]cos(55\°)=\frac{s}{q}[/tex]

solve for q

[tex]q=\frac{s}{cos(55\°)}[/tex]

case C)

In the right triangle of the figure

[tex]sin(55\°)=\frac{r}{q}[/tex]

solve for q

[tex]q=\frac{r}{sin(55\°)}[/tex]

case D)

In a right triangle

if [tex]A+B=90\°[/tex]

then

[tex]cos(A)=sin(B)[/tex]

therefore

[tex]q=\frac{s}{cos(55\°)}[/tex]------> [tex]q=\frac{s}{sin(35\°)}[/tex]

[tex]q=\frac{r}{sin(55\°)}[/tex] ------>  [tex]q=\frac{r}{cos(35\°)}[/tex]

Ver imagen calculista

The  expression that shows the value of q is q = √r² + s²

Right triangle

Right triangle has one of its angle as 90 degrees. The sides can be found using Pythagoras theorem.

Therefore,

  • c² = a² + b²

where

c = hypotenuse

a and b are the other legs.

The hypotenuse is the longest side of a right angle triangle.

Therefore,

s = adjacent side

r = opposite side

q = hypotenuse

Therefore,

q² = r² + s²

square root both sides

q = √r² + s²

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