Question

СРОЧНО!! дан треугольник АВС. угол С равен 90 градусам, угол А равен 30 градусам, отрезок ВА равен 26 см. Надите ВС. дам 30 баллов ​

Answer 1

Ответ:

13 см

Объяснение:

в треугольнике ABC - прямоугольном угол A = 30° ⇒ CB = AB : 2= 26 : 2 = 13 см (катет прямоугольного треугольника, лежащий напротив угла в 30°, равен половине гипотенузы)

Answer 2

Triangle ABC

Given that triangle ABC has angle C equal to 90 degrees, angle A equal to 30 degrees, and side BA equal to 26 cm, we need to find the length of side BC.

To find the length of side BC, we can use trigonometric ratios. In a right triangle, the sine, cosine, and tangent ratios can be used to relate the angles and sides of the triangle.

In this case, we can use the sine ratio to find the length of side BC. The sine of angle A is equal to the ratio of the length of the side opposite angle A (BC) to the length of the hypotenuse (BA).

Let's calculate the length of side BC using the sine ratio:

Step 1: Calculate the length of the hypotenuse (BA): Given that side BA is equal to 26 cm.

Step 2: Calculate the length of side BC using the sine ratio: The sine of angle A is equal to the ratio of the length of side BC to the length of side BA. sin(A) = BC / BA

Rearranging the equation, we get: BC = BA * sin(A)

Substituting the values, we have: BC = 26 cm * sin(30 degrees)

Now, let's calculate the length of side BC:

BC = 26 cm * sin(30 degrees) = 26 cm * 0.5 = 13 cm

Therefore, the length of side BC is 13 cm.

Please let me know if you need any further assistance!