Not necessarily because a trangle has three sides. If the third side is less than or equal to 2 cm or greater than or equal to 14 cm, then there is no triangle.
ONLY if the third side is 10 cm or sqrt(28)cm = 5.29 cm is the triangle right angled. So, out of an infinite number of possible values between 2cm and 14 cm, there are only two for which the triangle is right angled.
Incidentally, 10 = sqrt(82 + 62), and 5.29 = sqrt(82 - 62)
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yes
Height = 8 cm
(8x10) ÷ 2 = 40cm² (if units are cm)
Using Pythagoras' theorem the hypotenuse works out as 10 cm
Yes.