Find the area of an isoscales right triangle, if one of its right sides is 18 cm long.
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Answer:
162cm²
Step-by-step explanation:
hypotenuse=18√2
s=(18+18+18√2)/2
s=18+9√2
area=√s(s-a)(s-b)(s-c)
=√18+9√2(18+9√2-18)(18+9√2-18).
(18+9√2-18√2)
=√(18+9√2)×9√2×9√2×(18-9√2)
=√(324-162)×162
=√162×162
=162cm²
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