SI
ligure
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the board them download
A B C
and
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Answer:
angle B = 3x
angle C = 5x
angle D =2x
In ∆BCD of all angle sum
angle B +angleC +angle D = 180°
3x+5x+2x= 180°
10x = 180°
x = 180°/10
x = 18°
angleB = 3x
= 3×18°
= 54°
angleC = 5x
= 5×18°
= 90°
angleD = 2x
= 2×18°
= 36°
Hence, the value of B,C and D is 54°,90° and 36°
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