Exterior angle of a triangle = sum of opposite internal angles

Q.

If the exterior angle of a triangle is $130°$ and its interior opposite angles are equal, then measure of each interior opposite angle is

1. $55°$

2. $65°$

3. $50°$

4. $60°$

Q.

In the figure given above, to find external $\angle$BCD, minimum number of interior angles to be given is _____.

1. 1

2. 0

3. 2
4. 3

Q.

Find the value of the unknown exterior angle $x$ in the following diagram:

Q.

An exterior angle of a triangle is $105°$ and its two interior opposite angles are equal. Each of these equal angle is

1. $37{\frac{1}{7}}^{\circ }$

2. $52{\frac{1}{2}}^{\circ }$

3. $72{\frac{1}{2}}^{\circ }$

4. $75°$

Q.

The sides BC, CA and AB of $\Delta ABC$ are produced in order to form exterior angles $\angle ACD$, $\angle BAF$ and $\angle CBE$ respectively, then $\angle BAF+\angle ACD+\angle CBE$ is

1. 

2. 

3. 

4. 

Q. In the given figure, what type of a triangle is $△ABC$, provided DB = AB and AC = CE?

1. Isosceles
2. Equilateral
3. Scalene
4. Right-angled

Q.

The value of the exterior angle of a triangle is equal to the sum of __?

1. the two interior opposite angles

2. the other two exterior angles of a triangle

3. all the interior angles of a triangle

4. the value of external angles of a triangles cannot be found

Q.

In the figure given below, if OP || RS, ∠OPQ = 110^o and ∠QRS = 130^o, then ∠PQR is equal to

1. 60${}^{\circ }$

2. 65${}^{\circ }$

3. 40${}^{\circ }$

4. 45${}^{\circ }$