Classification of Triangles Based on Their Angles

Q.

A triangle with one obtuse angle is called a/an:

1. Right angled triangle

2. Isosceles triangle

3. Acute angled triangle

4. Obtuse angled triangle

Q. Identify the type of triangle whose angles are ${40}^{\circ },$ ${30}^{\circ }$ and ${110}^{\circ }.$

1. Acute triangle
2. Obtuse triangle
3. Equilateral triangle
4. Right triangle

Q. Identify the type of triangle whose angles are ${30}^{\circ },$ ${30}^{\circ }$ and ${120}^{\circ }.$

1. Acute triangle
2. Right triangle
3. Obtuse triangle
4. Equilateral triangle

Q.

A triangle with one obtuse angle and two acute angles is called a/an:

1. Right angled triangle

2. Isosceles triangle

3. Obtuse angled triangle

4. Vertically opposite angles

Q.

If one angle of a triangle measures ${105}^{\circ }$, then based on the angles the triangle is a/an ___.

1. Acute angled triangle

2. Scalene

3. Right angled triangle

4. Obtuse angled triangle

Q. Identify the type of triangle whose angles are ${70}^{\circ },$ ${80}^{\circ }$ and ${30}^{\circ }.$

1. Acute triangle
2. Obtuse triangle
3. Equilateral triangle
4. Right triangle

Q.

Given that in a triangle ABC, AB = 5.5 cm, BC = 5.5 cm, AC = 6 cm and $\angle ABC={120}^{\circ }$. The given triangle is a/an ___ based on its sides and a/an ___ based on its angles.

1. Scalene triangle, obtuse angled triangle

2. Isosceles triangle, obtuse-angled triangle

3. Equilateral triangle, right-angled triangle

4. Isosceles triangle, acute-angled triangle

Q. Identify the type of triangle whose angles are ${30}^{\circ },$ ${90}^{\circ }$ and ${60}^{\circ }.$

1. Acute triangle
2. Right triangle
3. Obtuse triangle
4. Equilateral triangle

Q.

Classify the following statement as true or false.

An equilateral triangle is always an acute-angled triangle.

1. True
2. False

Q. Can you guess how many degrees is the angle which is ―
• $\frac{1}{2}$ of a right angle __________

• $\frac{1}{3}$ of a right angle __________

• 2 times of a right angle __________

Q.

A triangle can have at most one ___________.

Q.

A triangle that has one angle greater than $90°$, but less than $180°$.

1. Right triangle

2. Obtuse triangle

3. Equilateral triangle

4. Acute triangle

Q. In a right angled triangle, the other two angles are angles.

1. acute
2. obtuse
3. equivalent
4. right

Q.

Classify the triangle as acute-angled, right-angled and obtuse-angled triangles on the basis of their angles which have been given below-:

$45°,90°,45°$

Q.

Write the name of triangle, whose each angle is acute.

Q. Identify the type of triangle.

1. Acute triangle
2. Right triangle
3. Obtuse triangle
4. Equilateral triangle

Q.

Classify the following triangles as acute-angled, right angled or obtuse-angled according to the magnitude of their angles.

$15°,75°90$

Q. Idenitfy the type of triangle.

(This question can have more than one right answer!)

1. Right triangle
2. Isosceles triangle
3. Scalene triangle
4. Acute-angled triangle

Q.

Why is it called a right angled triangle?

Q. Identify the type of triangle whose angles are ${60}^{\circ },$ ${50}^{\circ }$ and ${70}^{\circ }.$

1. Acute triangle
2. Equilateral triangle
3. Obtuse triangle
4. Right triangle

Q. All three angles of a triangle always add upto .

1. ${180}^{\circ }$
2. ${90}^{\circ }$
3. ${360}^{\circ }$
4. ${270}^{\circ }$

Q.

State whether the given triangle is acute, right or obtuse angle triangle.

Q. Each angle of an equilateral triangle measures .

1. ${120}^{\circ }$
2. ${30}^{\circ }$
3. ${80}^{\circ }$
4. ${60}^{\circ }$

Q. Identify the type of triangle.

1. Obtuse triangle
2. Equilateral triangle
3. Right triangle
4. Scalene triangle

Q.

Each angle of an equilateral triangle measures ___

1. ${45}^{\circ }$

2. ${30}^{\circ }$

3. ${60}^{\circ }$

4. ${180}^{\circ }$

Q.

Classify the following triangles as acute-angled, obtuse-angled, right-angled triangles according to the magnitude of their angles.

(iii) $40°,50°,90°$

Q.

State whether the given triangle is acute, right or obtuse angled triangle.

Q.

State whether the given triangles is acute, right or obtuse angled triangle.

Q.

Mark the correct answer.

A triangle that has no equal sides.

1. Scalene triangle

2. Isosceles triangle

3. Equilateral triangle

4. Acute triangle

Q. Identify the type of triangle whose angles are ${90}^{\circ },$ ${40}^{\circ }$ and ${50}^{\circ }.$

1. Acute triangle
2. Right triangle
3. Obtuse triangle
4. Equilateral triangle