If one angle of a triangle is greater than the sum of the other two angles then the triangle is
Acite angled
Obtuse-angled
Right angled
None of these
If one angle of a triangle is 90o then it is called _________
Acute angled triangle
Rigtht-angled triangle
Obtuse angled triangle
Equilateral triangle
The sum of angles of a triangle is equal to
One right angle
Two right angles
Three right angles
Four right angles
If all sides of a triangle are equal, then all its angles are
Different
Equal
Equal to 60o
Both 2 and 3
The point of intersection of the altitudes of a triangle is called _________
Orthocentre
Circumcentre
Centroid
If all sides of a triangle are equal, then it is called __________
Scalene triangle
Equilatoral triangle
Isosceles triangle
If one angle of a triangle is obtuse then that triangle is called ________
Acute angle triangle
Right angled triangle
Equalateral triangle
If in a triangle, each angle is less than 90o, then it is called _________
Acute-angled
Right-angles triangle
Obtuse-angled triangle
Corresponding to any side, the length of perependicular drawn from the opposite vertex to that side is ____________.
Altitude
Median
Perpendicular
The angles of a triangle are (2x + 10)o, (x + 20)o and (x - 10o). Find the value of x
10o
20o
30o
40o
