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The perimeter of a triangle is 22cm. If one of the sides is 9 cm . Find the other side if the area of the triangle is 20.976cm2

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4.661
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Soln 
L×L=area of a rectangle
9cm×£=20•976
9cm£=20•976cmtouch and hold a clip to pin it. unpinned clips will be deleted after 1 hour. 
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A=1/2×9×h=20.976
9/2×9/2h=20.976×9/2
H=4.7cm

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A=1/2×9×h=20.976
9/2×9/2h=20.976×9/2
H=4.7cm

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4.7
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The other side=8.3cm
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4.661
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1/2×y×9=20.976cm                      1/2y×9=20.976cm                        9/2y=20.976cm                              multiply each side with the receprical of 9/2.                         2/9×9/2=20.976×2/9.                        =4.661cm
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