Question

∆ abc angle b=90° ab=ac=5cm.then find ∆ abc the area.
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Answer 1

Step-by-step explanation:

Given, ∠A=90

∘

By Pythagoras theorem,

BC

2

=AB

2

+AC

2

BC

2

=5

2

+12

2

BC=13 cm

Area of triangle =

2

1

×base×height

Thus,

2

1

AB×AC=

2

1

AD×BC

5×12=13×AD

AD=

13

60

cm.