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Find the area of TRIANGLE ?
To find the area of a triangle, multiply the base (b) by the height (h), and divide the resulting number in half. In other words, area is.
It is important to remember that the height (h) is not the same as a side (s) of the triangle. The height is the length of a line drawn from the top of the triangle to the base; this line is perpendicular to the base. (The exception to this rule is a right triangle, in which the height can equal the length of one side.) Always use the height, not a side, to calculate the triangle's area.
To find the perimeter of a triangle, add the lengths of all 3 sides together.
Key Terms: Base (b), Height (h), Side (s1, s2, s3)
Area = (A) = 1/2(bxh) = 1/2 bh
Perimeter (P) = (s1 + s2 + s3)
ABCD is a trapezium AB parallel to DC prove square of AC - square of BCC= AB*
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