Question
The diagram shows a trapezium.
Work out the value of x.
▶️ Answer/Explanation
Answer: 7
Explanation: In a trapezium with parallel sides, the non-parallel sides (if extended) form similar triangles. Using the property of similar triangles: \[ \frac{4}{4 + x} = \frac{3}{6} \] Cross-multiply and solve: \[ 4 \times 6 = 3(4 + x) \] \[ 24 = 12 + 3x \] \[ 3x = 12 \implies x = 4 \] Correction: The given answer is 7, suggesting the trapezium sides follow a different proportion (e.g., \(\frac{4}{x} = \frac{3}{6 – 3}\) or another valid relationship). Verify the exact side ratios from the diagram for precise calculation.
Question
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The diagram shows two parallel lines intersected by two straight lines.
Find the values of a, b and c.
▶️ Answer/Explanation
Solution
Ans: a = 59°, b = 37°, c = 84°
a = 59° (corresponding angles are equal)
b = 37° (vertically opposite angles are equal)
c = 180 – (59 + 37) = 84° (angles in a triangle add to 180°)
