Question

class 7
please help me
it is so important
please​

Answer 1

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Answer 2

GIVEN

∠A=20

∠B=40

∠D=50

SOLUTION

∠x=180-(20+40)    (Angle sum property)

∠x=120

∠x+∠y=180             (Linear pair)

As angle x=140 so

140+∠y=180

∠y=40

∠y+∠D+∠z=180     (Angle sum property)

As angle y =40 so

50(∠D given)+40(∠y)+∠z=180

90+∠z=180

∠z=90

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