- A3
- B2
- C0
- D1
Step-by-Step Solution
An acute exterior angle means an obtuse interior angle, and a triangle has at most one obtuse angle. So at most one exterior angle is acute.
Answer: D) 1
At most how many of the three exterior angles of a triangle (one at each vertex) can be acute?
Class 9Exterior Angle of a TriangleGeometry — Lines and Angles
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 Exterior Angle of a Triangle practice questions
More Class 9 Exterior Angle of a Triangle practice
To prove the exterior angle theorem, a line CE is drawn through C parallel to BA, as…Through C a line CE is drawn parallel to BA, as shown. ∠ACE = 50° and ∠ECD = 55°. Find…In △ABC, ∠B = 45° and ∠C = 75°. Side CA is produced beyond A. What is the exterior angle…In the figure, D lies on BC. ∠BAD = 30°, ∠B = 45° and ∠C = 50°. Find ∠DAC.In △ABC, ∠B = 60° and ∠C = 40°. AD bisects ∠A and meets BC at D. Find ∠ADC.