do the questions 21, 22 ,23
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solution 21, perimeter of triangle ABC=180cm
AB=80cm, AC=18cm,. BC=?
AB+AC+BC=180
80+18+BC=180
BC=82cm
by using herons formula you will get area
then use formula 1/2×base(18)×height=area of triangle ABC ,you will get the height of triangle ABC.
solution 23, x=√p+2q+√p-2q/√p+2q-√p-2q
on rationalising and solving,
AB=80cm, AC=18cm,. BC=?
AB+AC+BC=180
80+18+BC=180
BC=82cm
by using herons formula you will get area
then use formula 1/2×base(18)×height=area of triangle ABC ,you will get the height of triangle ABC.
solution 23, x=√p+2q+√p-2q/√p+2q-√p-2q
on rationalising and solving,
kjb:
thnx for your help
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