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Question:
Ratio of consecutive angles of quadrilaterals is 1:2:3:4. Find the measure of its each angle. Write , with reason, what type of quadrilateral it is.
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Answer:-
Given that,
Ratio of consecutive angles of quadrilaterals is 1:2:3:4
We know that, Sum of all interior angles of a quadrilateral is 360°.
Let the angles be x, 2x,3x and 4x.
So,
sum=x+2x+3x+4x=10x
>> 10x=360°
>> x=36°
>> 2x=72°
>> 3x=(72+36)°=108°
>> 4x=144°
Therefore, the angles are,
36°,72°,108° and 144°.
Now,
x +3x=(36+108)°=180°
also, x and 3x are cointerior angles.
So,
AB || CD
Therefore, It is a trapezium.
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