Question

Triangular pieces in an instruments box are called as:
A. Protractors
B. Compasses
C. Scales
D. Set squares

Answer 1

Hint: The instrument in the geometry instruments box having the shape of a triangular is called set square.

Complete step-by-step solution -
The above options are found in the students’ geometry instruments box. But only the Set square is triangular.
Option D is the right answer.
A set square is a geometric instrument found in the geometry instrument box. It is having triangular in shape. It is used in engineering and technical drawing with the aim of providing a straightedge at a right angle or other particular planar baselines.
The simplest form of a set square is a triangular piece. So, we get (D) set square as the right answer.
A. Protractor is not the right because it isn’t triangular.
A protractor is an angle measuring instrument. They are usually semicircular \[\text{360}{}^\circ \] versions. The small hole near the bottom of the vertex of the angle to be measured.
B. Compass. It is also an instrument found in the geometry instrument box. It is a technical drawing instrument that can be used for inscribing circles or arcs. As dividers, they can also be used as tools to measure distances in particular on maps. Compass can be used for mathematics drafting, navigation, and other purposes. A compass is also known as a pair of compasses. So, it is not triangular in shape. And the (B) option is not the right answer.
C. Scale: A scale is an instrument found in a geometry box. It is used for drawing geometric figures. It is also used for measuring things. Length for drawing segments etc. it is not in a triangular shape.
So it is not the right answer.
From the above discussion, we conclude that the set square is an instrument that is triangular in shape.

Note: In the geometry instruments box we have seen all the instruments. We know that protractors, compasses, and scales are not triangular in shape.
So we get the option (D) set square as the right answer.