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***** 20

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16

please show me how to find the perimter and area of above triangle. thanks.

suwanee

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- May 29th 2007, 08:39 PMSuwaneeGeometry, perimeter, area of a triangle
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***** 20

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16

please show me how to find the perimter and area of above triangle. thanks.

suwanee - May 29th 2007, 11:00 PMearboth
Hello,

I assume that your triangle is a right triangle.

1. Perimeter. You know already the length of 2 sides. Use Pythagorean theorem to find the 3rd side:

$\displaystyle s=\sqrt{20^2 - 16^2}=12$

Thus the perimeter is p = 20 + 16 + 12 = 48

2. Area: The area of a right triangle is the half of a rectangle. The sides of the rectangle are the legs of the right angle. Thus

$\displaystyle A_{rectangle}=16 \cdot 12 = 192$

Therefore the area of the triangle is 96 square units. - May 30th 2007, 04:04 AMSuwaneethanks!!!
Thank you Earboth!!!!!