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what's the formula for finding the area of a rectangle

I just want to know what the formula to find the area of a triangle that is all

 

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Tom M. | Expert Exam Prep - 19 years experience with all kinds of students.Expert Exam Prep - 19 years experience w...
4.9 4.9 (452 lesson ratings) (452)
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Area = (1/2)(Base)(Height)

Remember that most triangles are 1/2 of a rectangle, so their area is 1/2 of the rectangle's.

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Right triangles's area in half of the are of rectangle with height and width equals legs ( sides of the right angle).
   Accordingly the area of a regular triangle is half of the corresponding parallelogram with sides as 2 sides of
 a triangle.  
April G. | Math tutorMath tutor
5.0 5.0 (55 lesson ratings) (55)
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Area of a triangle = (1/2)*b*h where b is the base of the triangle and h is the height.

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Area of a rectangle = b*h

:)