Will mark Brainlest help me to find the value of x (step by step) pls​

x=5 cm

Step-by-step explanation:

triangle ABC is an isoceles triangle

so BC=AC

BC=X and

angle B and angle A both is theta degree because base angles of an isosceles triangle are equal

to find angle A and B

angle A + angle B + angle c=180 degree (sum of interior angles of a triangle)

theta + theta +90=180

2theta=180-90

2theta=90

theta=90/2

theta=45 degree

sin both angle A and angle B are theta their value is 45 degree.

For side x

now using pythagoras theorem

take theta as reference angle

using sin rule

sin 45=opposite/hypotenuse

=x/

=x

=x

5=x

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a. is correct