Respuesta :

laurellee27

Answer:

3

Step-by-step explanation:

First of all, the area in a triangle adds up to 180.

Secondly, it's an equilateral triangle, so all 3 angles are the same. Therefore, all 3 angles must equal 180/3 = 60.

Angle B - 25x - 15 = 60

Rearrange to get x on it's own.

25x - 15 = 60

25x = 60 + 15

25x = 75

Divide by the coefficient to find x.

25x = 75

x = 75/25

x = 3

Answer:

Step-by-step explanation:

The given triangle ABC is an equilateral triangle. This is because all the sides are equal. It is depicted by the three marks on each side of the equilateral triangle. Since the sides are equal, all the angles are also equal. Therefore,

2y = 25x - 15

25x -2y = 15- - - - - - - - 1

Also, the sum of angles in a triangle is 180 degrees. It means that

2y + 25x - 15 + C = 180

C = 2y = 25x - 15

Therefore

2y + 25x - 15 + 2y = 180

4y + 25x = 180 + 15 = 195

25x + 4y = 195 - - - - - - - - 2

Subtracting equation 2 from equation 1, it becomes

-6y = -180

y = -180/-6 = 30

2y = 25x - 15

2×30 = 25x - 15

60 + 15 = 25x

25x = 75

x = 75/25 = 3

Otras preguntas