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प्रश्न
State the property that is used in each of the following statements?
- If a || b, then ∠1 = ∠5.
- If ∠4 = ∠6, then a || b.
- If ∠4 + ∠5 = 180°, then a || b.

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उत्तर
- If two parallel lines are cut by a transversal, then each pair of corresponding angles has the same measure.
- If two parallel lines are cut by a transversal, then each pair of alternate interior angles is equal.
- If two parallel lines are cut by a transversal, then each pair of interior angles on the same side of the transversal are supplementary.
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संबंधित प्रश्न
In the adjoining figure, p || q. Find the unknown angles.

Find the value of x in the following figures if l || m.

Find the value of x in the following figures if l || m.

Find the value of x in the following figure if l || m.

A horizontal line and a vertical line always intersect at right angles.
Draw a rough figure and label it suitably in the following case:
\[\overleftrightarrow{XY}\] and \[\overleftrightarrow{PQ}\] intersect at M.
Draw a rough figure and label it suitably in the following case:
\[\overleftrightarrow{OP}\] and \[\overleftrightarrow{OQ}\] meet at O.
The definitions of parallel lines and intersecting lines are applicable only when the lines are:
The angle (θ) formed by two intersecting lines must satisfy which condition?
As two intersecting lines move away from their Point of Intersection, the distance between them:
