The interior opposite angles of a triangle are in the ratio 1:3. Given that, an exterior angle of the triangle is 80°. Find the value of interior opposite angles.
30°, 60°.
40°, 120°.
20°, 60°.
90°, 60°.
If one angle of a triangle is equal to the sum of the other two angles, then the triangle is:
Obtuse triangle
Isosceles triangle
Equilateral triangle
Right triangle
In the figure below, which of the following are corresponding angle pairs?
∠p and ∠q.
∠p and ∠z.
∠p and ∠w.
∠p and ∠x.
What is the angle of an acute angle?
Less than 90°.
Equal to 180 degrees.
More than 90 degrees.
Equal to 90 degrees.
The angles of a triangle are in the ratio 5:3:7. The triangle is:
Acute-angled triangle
Obtuse-angled triangle
Right triangle.
