ATDH - Admission Test for Dental Hygiene Perceptual Ability: Angles Questions and Answers — Questions and Answers
Question 1: Rank the following angles from smallest to largest.
- C, A, D, B (Correct answer)
- A, C, D, B
- C, D, A, B
- B, D, A, C
Correct answer: C, A, D, B
Angle C is the most acute (smallest). Angle A is slightly larger than C. Angle D is larger still, approaching a right angle. Angle B is the most obtuse (largest) of the four. Therefore, the correct order from smallest to largest is C, A, D, B.
Question 2: A dental hygienist is examining the angulation of different periodontal probes. Which of the following instruments shows the largest angle?
- Instrument B
- Instrument A
- Instrument D (Correct answer)
- Instrument C
Correct answer: Instrument D
By visually comparing the four angles, Angle D is the most open, making it the largest (most obtuse) angle among the choices. Angle A is the smallest, followed by C, then B, with D being the largest.
Question 3: Four surfaces of a tooth are represented by the angles below. Which of the angles is the smallest?
- Angle A
- Angle C (Correct answer)
- Angle B
- Angle D
Correct answer: Angle C
To find the smallest angle, look for the one that is the most 'closed' or acute. Angle C is visibly narrower than angles A, B, and D. Angle D is the largest, while A and B are intermediate and very close in size, but both are clearly larger than C.
Question 4: From the options provided, identify the largest angle.
- Angle D
- Angle B
- Angle C
- Angle A (Correct answer)
Correct answer: Angle A
The largest angle is the one that is most open or obtuse. Comparing the four options, Angle A is clearly the most open, extending well beyond a 90-degree right angle. Angles B, C, and D are all acute angles, making them smaller than A.
Question 5: In the geometric shape below, four interior angles are indicated. Which of the labeled angles is the smallest?
- Angle A
- Angle D
- Angle B (Correct answer)
- Angle C
Correct answer: Angle B
By inspecting the four labeled angles within the shape, Angle B is the most acute or 'sharpest' corner. Angle C is a right angle (90 degrees). Angles A and D are both obtuse, making them significantly larger than Angle B.
Question 6: Review the four angles presented. Rank them in order from largest to smallest.
- A, D, C, B (Correct answer)
- B, C, D, A
- A, C, D, B
- D, A, B, C
Correct answer: A, D, C, B
Angle A is the largest, being the only obtuse angle. Angle D is the next largest, appearing to be close to a right angle. Angle C is smaller than D, and Angle B is the most acute and therefore the smallest. The correct ranking from largest to smallest is A, D, C, B.
ATDH - Admission Test for Dental Hygiene Perceptual Ability: Angles Questions and Answers
Rank the following angles from smallest to largest.