Question

one of the angles of paralellogram is two third of its adjacent anles.remaining angles of trianle are in ratio 5:7 find the second largest anglein triangle

Answer 1

5:7=5+7=12
The sum of two angles =180
$\frac{5}{12} \times 180 = 75$
The first angle =75
$\frac{7}{12} \times 180 = 105$
This is the second angle
The second largest angle is 105
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