Question

ABC is a triangle right angled at C. If AB =25 cm and AC =7 cm, find BC.

Answer 1

Answer:

24 cm

Step-by-step explanation:

(AB) ^2 = (AC) ^2 + (BC) ^2

(25)^2 = (7)^2 + (BC) ^2

625 = 49 + (BC) ^2

BC = √625 - 49

BC = √576

BC = 24 cm

Answer 2

Answer:

according to pythagoras theorem=

${25}^{2} = {7}^{2} + {x}^{2}$

$625 = 49 + {x}^{2}$

$625 - 49 = {x}^{2}$

$576 = {x}^{2}$

$x = \sqrt{576}$

$x = 24$