Maths 2 Marks Questions

An angle whose measure is more than 90° but less than 180° is called an obtuse angle. A triangle cannot have two obtuse angles because the sum of all the angles of it cannot be more than 180^o. It is always equal to 180^o.

If two intersect each other at a point, then four angles are formed. If one of these four angles is a right angle, then each of the other three angles will also be a right by linear pair axiom.

Infinitely many triangles,
The sum of given angles = 53° + 64° + 63° = 180°
Here, we see that sum of all interior angles of triangle is 180°, so infinitely many triangles can be drawn.

No, each of these angles will be a right angle only they form a linear pair, i.e., when the non-common arms of the given two adjacent angles are two opposite rays & common arm is perpendicular to them.

A triangle cannot have all angles less than 60°. Then, sum of all the angles will be less than 180° whereas sum of all the angles of a triangle is always 180°.