Vertical Angels,Corresponding Angles,Alternate Interior Angles

Definition
• Transversal … a line that intersects 2 others.

(e.g.) The red line in Figure 1

• Vertical Angles … The opposite angles formed by two intersecting straight lines.

(e.g.) a and d in Figure 1 (b and c, e and h, g and f in Figure 1 are also the vertical angles.)

• Corresponding Angles … a pair of angles at the same location at each intersection.

(e.g.) a and e in Figure 1 (b and f, c and g, d and h in Figure 1 are also the corresponding angles.)

• Alternate Interior Angles … a pair of angles inside the parallel lines on opposite sides of the transversal.

(e.g.) c and f, d and e in Figure 1 are the alternate interior angles.

Definition • Transversal … a line that intersects 2 others. (e.g.) The red line in Figure 1 • Vertical Angles … The opposite angles formed by two intersecting straight lines. (e.g.) a and d in Figure 1 (b and c, e and h, g and f in Figure 1 are also the vertical angles.) • Corresponding Angles … a pair of angles at the same location at each intersection. (e.g.) a and e in Figure 1 (b and f, c and g, d and h in Figure 1 are also the corresponding angles.) • Alternate Interior Angles … a pair of angles inside the parallel lines on opposite sides of the transversal. (e.g.) c and f, d and e in Figure 1 are the alternate interior angles.	Figure 1 cf. a and h, b and g in Figure 1 are called the Alternate Exterior Angles.
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