Question

(3) ∠C of triangle ABC is a right angle .If

AC= 5 cm and AB=13 cm, then find the

length of BC.​

Answer 1

Answer:

12cm Ok!

Step-by-step explanation:

According to Pythogaras Theorm

AB²=AC²+CB²

BC=√13²+5²=√144=12cm

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Answer 2

Answer:

12cm

Step-by-step explanation:

AC = 5cm

AB = 13cm

thus, by Pythagoras theorem,

= AC^2 + BC^2 = AB^2,

= 5*5 + BC^2 = 13*13,

= BC^2 = 169-25,     (13*13=169, 5*5=25)

= BC^2= 144,

=> BC = under root  144,

=> BC = 12cm.