ATDH - Admission Test for Dental Hygiene Perceptual Ability: Angles Questions and Answers

Question 1

Rank the following angles from smallest to largest.

Accepted Answer

C, A, D, B

Answer

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?

Accepted Answer

Instrument D

Answer

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?

Accepted Answer

Angle C

Answer

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.

Accepted Answer

Angle A

Answer

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?

Accepted Answer

Angle B

Answer

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.

ATDH - Admission Test for Dental Hygiene Practice Test

ATDH - Admission Test for Dental Hygiene Practice Test

ATDH - Admission Test for Dental Hygiene Perceptual Ability: Angles Questions and Answers