Respuesta :

Given:

  • Trapezium

To find:

  • Length of BC
  • Value of "x"

Solution:

We can divide the given shape into a triangle and a rectangle.

We'll have to use Pythagoras Theorem.

[tex]\large\boxed{Formula:{a}^{2}={b}^{2}+{c}^{2}}[/tex]

In this question we have to find the hypotenuse so we'll have to add.

Let's substitute the values according to the formula.

[tex]BC= {6}^{2}+{7}^{2}[/tex]

[tex]BC= 85[/tex]

[tex]BC = \sqrt{ 85} [/tex]

[tex]\boxed{BC=9.22 \: cm}[/tex]

Now, we can find the value of "x"

  • Adjacent= 7 cm
  • Opposite= 6 cm
  • Hypotenuse= 9.22 cm

We can use any one from SOHCAHTOA.

Here I'm using tan.

[tex]\large\boxed{Formula: tan(a)= \frac{opp}{adj}}[/tex]

Let's substitute the values according to the formula.

[tex]tan \: x= \frac{6}{7}[/tex]

We'll have to use tan inverse.

[tex]x= {tan}^{-1}(\frac{6}{7})[/tex]

[tex]\boxed{x=40.6°}[/tex]

1)

=9.22 cm

2)

=40.6°

hope this helps