P and R are point on side CD of a parallelogram ABCD . Show that (i). ar (triangle PAB) = ar(triangle RAB) (ii). aIf ar (triangle PAB) = 8 cm square, find ar (ABCD)
geetika3:
in this ques no triangle RAB is forming
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When parallelogram and triangle are on the same base and between same parallelsthen area of triangle is half that of the parallelogram.ar. RAB = 12ar ABCD −−−−−−−−−−−−−−−−−(1)ar. PAB = 12ar. ABCD−−−−−−−−−−−−−−−−−(2)From (1) and (2)ar. PAB = ar. RABar. ABCD = 2 ar. PABar. PAB = 8 cm2ar. ABCD = 2×8 = 16 cm2


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