क्षेत्रफळ

क्षेत्रफळ 

1. Square ( चौकोन ) = a² 
2. Rectangle (आयात ) = ab 
3. Parallelogram (सामान्तार्भुज चौकोन )= bh 
4. Trapezoid (समलंब चौकोन )= h/2 (b₁ + b₂) 
5. Circle ( वर्तुळ ) = π r ² 
6. Ellipse(लंब वर्तुळ ) =π r₁ r₂ 
7. Triangle( त्रिकोण ) = (1/2) b h 
8. Equilateral Triangle ( समभूज त्रिकोण ) = (1/4)(3) a²
9. Triangle given SAS = (1/2) a b sin C
10. Triangle given a,b,c = [s(s-a)(s-b)(s-c)] when s = (a+b+c)/2

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