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CTET Basic Geometrical Ideas — practice questions

Explore 85 free Basic Geometrical Ideas questions in CTET Mathematics. Open each question or exercise to read its content, reference answers and available explanation.

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Basic Geometrical Ideas questions and exercises with answers

Showing questions 1–30 of 85.

Which name is given to every angle smaller than a right angle?Read the answer and worked solution →At 3 o'clock the clock hands make which type of angle?Read the answer and worked solution →Which kind of angle lies between a right angle and a straight angle?Read the answer and worked solution →Opening two rays into a flat straight line makes an angle of how many degrees?Read the answer and worked solution →Turning a ray through 250° from its start makes which type of angle?Read the answer and worked solution →An angle that makes one complete turn measures how many degrees?Read the answer and worked solution →What is the common endpoint of the two sides of an angle called?Read the answer and worked solution →Angles that together make up a right angle are known as what?Read the answer and worked solution →Which name fits two angles whose sum equals a straight angle?Read the answer and worked solution →Which pair of angles adds up to a full turn of 360°?Read the answer and worked solution →Find the complement of a 35° angle.Read the answer and worked solution →How many degrees must be added to 110° to reach a straight angle?Read the answer and worked solution →At a crossing of two lines, one angle is 70°. How large is the angle across from it?Read the answer and worked solution →Two angles side by side on a straight line (a linear pair) add up to what?Read the answer and worked solution →What is the total of the three angles inside any triangle?Read the answer and worked solution →Adding all four corner angles of a convex four-sided shape gives how many degrees?Read the answer and worked solution →A triangle has angles of 48° and 67° at two corners. How big is the third corner?Read the answer and worked solution →In a right triangle one acute angle is 35°. What is the other acute angle?Read the answer and worked solution →What are two angles that share a vertex and an arm, with no overlap, called?Read the answer and worked solution →What is a line that cuts across a pair of other lines called?Read the answer and worked solution →An interior angle of a polygon is 100°. What is the exterior angle at that corner?Read the answer and worked solution →Two lines that meet at a right angle are said to be what?Read the answer and worked solution →The word obtuse in obtuse angle means what?Read the answer and worked solution →An angle formed by two rays with a common endpoint lies in what?Read the answer and worked solution →A straight line in geometry has how much width?Read the answer and worked solution →Euclid defined a line as a what?Read the answer and worked solution →How many straight lines can pass through two distinct points?Read the answer and worked solution →At most how many points can two different straight lines share?Read the answer and worked solution →What are points lying on the same straight line called?Read the answer and worked solution →A ray has how many starting points, and does it end?Read the answer and worked solution →

Worked practice questions

Which name is given to every angle smaller than a right angle?

  1. Acute angle
  2. Obtuse angle
  3. Reflex angle
  4. Straight angle
Show answer and solution

Correct answer: A. Acute angle

1. A right angle is 90°, so a smaller angle is called acute. 2. Obtuse angles lie between 90° and 180°, so they are larger. 3. Reflex angles lie between 180° and 360°, and a straight angle is exactly 180°. _Source: Wikipedia, Angle, Common angles_

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At 3 o'clock the clock hands make which type of angle?

  1. Acute angle
  2. Right angle
  3. Straight angle
  4. Reflex angle
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Correct answer: B. Right angle

1. A full turn is 360°, and a quarter of it is 90°. 2. An angle of 90° is a right angle. 3. An acute angle is below 90°, and a straight angle is half a turn (180°). _Source: Wikipedia, Angle, Common angles_

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Which kind of angle lies between a right angle and a straight angle?

  1. Acute angle
  2. Right angle
  3. Reflex angle
  4. Obtuse angle
Show answer and solution

Correct answer: D. Obtuse angle

1. 135° is larger than 90°. 2. It is smaller than 180°, so it lies between a right angle and a straight angle. 3. Such an angle is obtuse, not acute (below 90°) or reflex (above 180°). _Source: Wikipedia, Angle, Common angles_

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