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4. In parallelogram ABCD, AB = 16 cm and BC = 12 cm. Find the perimeter of parallelogram. pls.s plssssssss tell me my dear frnds pls tell me in full explanation |
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Answer» In △ABC,s= 2AB+BC+CA ⇒s= 212+20+16 =24cmBy USING Heron's formula,⇒A= s(s−a)(s−b)(s−c) Area of △ABC(A)= 24(24−16)(24−12)(24−20) ⇒A= 24×8×12×4 =96cm 2 THEREFORE,As we know that the diagonal of a parallelogram divides it into TWO EQUAL triangles.Therefore,Area of parallelogram =2A=2×96=192cm 2 |
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