LINES AND ANGLES

Gap-fill exercise

  
Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
A part (or portion) of a line with two end points is called a .

A part of a line with one end point is called a .

If three or more points lie on the same line, they are called points; otherwise they are called points.

An is formed when two rays originate from the same end point.

The rays making an angle are called the of the angle

The end point is called the of the angle.

An measures between 0° and 90°, whereas a right angle is exactly equal to 90°.

An angle greater than 90° but less than 180° is called an .

An angle which is greater than 180° but less than 360° is called a .

Further, two angles whose sum is 90° are called .

Two angles whose sum is 180° are called .

When the sum of two adjacent angles is 180°, then they are called a of angles.

If a side of a triangle is produced, then the angle so formed is equal to the sum of the two opposite angles.

If a intersects two parallel lines, then each pair of alternate interior angles is equal.

If a transversal intersects two parallel lines, then each pair of interior angles on the same side of the transversal is .

A line which intersects two or more lines at distinct points is called a .

If a ray stands on a line, then the sum of two adjacent angles so formed is °.