- A50°
- B60°
- C90°
- D120°
Step-by-Step Solution
60, 90 and 120° are directly constructible; 50° is not constructible with compass and straightedge because it is not obtainable from 60° by bisections and standard combinations.
Answer: A) 50°
Which angle CANNOT be constructed directly using only a compass and straightedge in one standard step?
Class 9Constructions of TrianglesGeometry
Master this chapter in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Constructions of Triangles practice questions
More Class 9 Constructions of Triangles practice
In constructing a triangle from base BC and angle B with given AB + AC, after drawing BC…An isosceles right triangle is to be constructed with its right angle at A. The two…Ria constructs angles of 60° and 90° with a compass and then bisects the angle between…The minimum number of independent measurements (data) needed to construct a unique…Given base = 6 cm and the sum of the other two sides = 8 cm with base angle 60°, the…