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There are two equal sides of 19 units in the right angled triangle. To find the third side use Pythagoras' theorem: 192+192 = 722. The square root of 722 = 26.87005769 Perimeter of triangle = 19+19+26.87005769 = 64.87005769 Therefore perimeter of triangle rounded to 2 decimal places = 64.87 units.

Q: Triangle ABC is an isosceles right triangle with angle an equal to 90 degrees Find the perimeter if AB equals 19 Round answer to 2 decimal places?

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