Question

The instrument in the geometry box in the shape of a triangle is called a:
(a)Protractor
(b)Compasses
(c)Divider
(d)Set-square

Answer 1

Hint: Two pieces of the instrument asked are present in a basic geometry box. However, their configurations are different.

Complete step-by-step answer:
A geometry box is a set of basic equipment required for regular use in basic geometrical diagram and graphs.
The basic geometry box consists of a compass, a 15cm ruler, a divider, 2 set squares and a protractor.
So, let us go one by one.
First is the ruler. A ruler is an instrument i.e. used to measure as well as draw lines according to the need.
Next is the compass. A compass is an instrument used to draw the circles of desired diameters with desired centres.
A divider is an instrument used to trace the distance between any two given points with high accuracy.
While all these are drawing tools, a protractor is a tool which is mostly used to measure the angle between two given intersecting lines.
And the last instrument in a geometry box are the set-squares. A geometry box consists of two set-squares which are triangular in shape and the interior angles of the vertex being ${{30}^{\circ }}-{{60}^{\circ }}-{{90}^{\circ }}$ for one and the other having ${{45}^{\circ }}-{{45}^{\circ }}-{{90}^{\circ }}$ .
So, from the above explanations it is clear that the triangular shaped instrument present in a geometry box is set-square.
Hence, the answer to the question is option (d) set-square.

Note: The above mentioned instruments are the instruments present in basic geometry boxes but there are specialised geometry boxes which might contain some advanced instruments as well.