Question

5. For finding AB and BC with the 1 help of information given in figure 83 . 2.20, complete following activity.​

Answer 1

Step-by-step explanation:

In △ABC

∠B=90 ∘

,AC= 8

AB=BC,∴∠A=∠C=45 ∘

 By 45 −45 ∘−90 ∘

theorem, AB=BC= 1/√2×AC

1/√2 x √8

1/√2 x 2√2

=2

Hence, AB = 2 and BC = 2

 Hence, the completed activity is

 AB=BC .... Given 

∴∠BAC=45 ∘

∴AB=BC= 1/√2 ×AC

= 1/ √2 x √8

1/ √2 x 2√2

= 2

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