Question

In the figure AC = 5 cm. , <B = 90°, <C = 45°

What is the length of AB ?.( Correct to two decimal

places​

Answer 1

Answer:

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Answer 2

Answer:

The answer is 5 by √2

Step-by-step explanation:

in a triangle <A+<B +<C = 180°

therefore <A=45°

implies it is isosceles right angle triangle

By Pythagoras theorem

AB^2+BC^2=AC^2

(AB = BC)

2AB^2=5^2

AB^2=25 by 2

AB=BC=5 by √2