Question

In a triangle ABC , angle B = 90 degree , AB = 5 cm and angle A = 45 degree then BC = ? ​

Answer 1

Answer:

AB = 5√3 cm

Step-by-step explanation:

angle b = 90°

angle a = 30°

angle c = 60° ( remaining angle of triangle)

side opposite to 30 degrees = 1/2 * h * y * p

BC = 1/2 * A * C

= 1/2 × 10

= 5 cm.

side opposite to 60° = √3/2 × hypotenuse

AB= √3/2 × AC

= √3/2 x 10

=5√3 was cm.

Ans. side BC = 4 cm. Side AB = 5√3 cm