9. The sides of a quadrilateral are...
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9. The sides of a quadrilateral are produced in order. What is the sum of the four exterior angles 10. The measure of the angles of a pentagon are (x - 5). (x - 6)". (2x - 7)º, x° and (2x - 2). Find the value of X. 11. The ratio of two sides of a parallelogram is 3:5 and its perimeter is 80 cm. Find the sides of the parallelogram. O VS Good

11th - 12th Class
Maths
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3
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( operatorname{lom} A B C ) [ begin{array}{c} A B C D rightarrow A B=C D A A D=B C A B=3 x Rightarrow B C=5 x end{array} ] ( Rightarrow quad ) Permeten ( =A B+B C+C D+A D ) Fh [ begin{aligned} 80 &=3 x+5 x+A B+B C &=8 x+3 x+5 x 80 &=16 x x &=frac{20}{4}=50 &=5 mathrm{cm} end{aligned} ] 80 , sides of parallelogram ( =A B ) f ( B C ) ( =3(5)+5(5) ) ( =15 mathrm{cm} & 25 mathrm{cm} )
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