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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°.
$\therefore$ 2x + 3x + 4x + 6x = 360
15x = 360
x = 24
Therefore, the measures of the angles are 48°, 72°, 96° and 144°.
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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°
Therefore, the angles are of the measures 36°, 60° and 84°.
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