Obtuse Angled Triangle

Q.

A triangle can have more than one obtuse angle

1. True

2. False

Q. An acute-angled triangle has _____ acute angles.

1. \N
2. 1
3. 2
4. 3

Q. Identify the type of triangle given below:

1. Obtuse and Acute angled triangle
2. None of the above
3. Isosceles and Acute angled triangle
4. Obtuse and right angled triangle

Q.

In a $△ABC,\angle A=\angle B=\angle C={60}^{\circ }$, then what is the type of the triangle?

1. 70

2. Acute Angled Triangle

3. Isosceles Triangle

4. Scalene Triangle

Q.

Which of the following triangles are isosceles as well as obtuse-angled triangles?

1. Fig 2 and Fig 3 only

2. Fig 1 and Fig 3 only

3. Fig 1, Fig 2 and Fig 3 only

4. Fig 1, Fig 2 and Fig 4 only

Q.

Match the Column I with Column II with their respective values.

Column 1	Column 2
3 sides of equal length	Obtuse Angled
1 right angle	Right Angled
2 sides of equal length	Equilateral
1 obtuse angle	Isosceles

Q.

Write True or False :

We can construct a triangle whose angles are $105$$°$, $70$$°$and $5$$°$.

1. True
2. False

Q. What type of triangle is $△ABC,$ where $\angle A={134}^o,\angle B={15}^o\text{and}\angle C={31}^o?$

1. Acute-angled triangle
2. Obtuse-angled triangle
3. Right-angled triangle
4. None of these

Q.

Which of the following triangles are isosceles as well as obtuse-angled triangles?

Q. Explain the three types of triangles based on their angles. [2 MARKS]

Q. The sides of a triangles are $a,b,\sqrt{a^2+ab+b^2}$,
prove that the greatest angles is ${120}^o$.

Q. Which of the following triangles have their one side as an altitude?

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