In parallelogram ABCD, DM is an altitude corresponding to base AB. If AB=15cm and ar(ABCD)=360 cm square, then DM=______________ cm.
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Answer:
BC = 10 cm.
Step-by-step explanation:
Area of a parallelogram = Base x altitude
Let the base be AB.
Base = 12 cm.
Altitude (DM) = 5 cm.
Area of the parallelogram = 12 x 5 = 60 sq.cm.
Altitude corresponding to BC is DN.
DN = 6cm.
Area of the parallelogram = BC x DN
60 sq.cm. = BC x 6
BC = 60/6
BC = 10 cm.
Therefore, BC=10cm
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