Question

find the angles of parallegram ABCD if (1)angle A:angleB =2:7 (2)angle C= 2/3aangle d
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Answer 1

Answer:

(1)

let the proportionality constant be x

2=2x

7 =7x

angle A + angle B=180 by ( co-interior angle )

9x=180

x= 180/9

x=20

2x=2×20=40

7x=7×20=140