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Question 13 Marks
The angles of a quadrilateral are in the ratio $2 : 3 : 4 : 6$. Find the measures of these angles.
Answer
Suppose the angles are $2x, 3x, 4x,$ and $6x.$
We know that the sum of the angles of a quadrilateral is $360^\circ .$
$\therefore 2x + 3x + 4x + 6x = 360 15x = 360 x = 24$
Therefore, the measures of the angles are $48^\circ , 72^\circ , 96^\circ $ and $144^\circ .$
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Question 23 Marks
The angles of a triangle are in the ratio $3 : 5 : 7$. Find the measures of these angles.
Answer
The angles are in ratio $3 : 5 : 7$
Suppose the angles are $3x, 5x$ and $7x$.
$\therefore 3x + 5x + 7x = 180$ (angle sum property of a triangle)
$15x =180 x = 12^\circ $
Therefore, the angles are of the measures $36^\circ , 60^\circ $ and $84^\circ .$
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