Can two angles be supplementary if both of them are: (i) acute (ii) obtuse (iii) right?

Let angles are 4x & 5x.  ∴ Angles are supplementary  ∴ 4x + 5x = 1800  ⇒ 9x = 1800  ⇒ x = 180o/9 = 20o  ∴ Angles are 4 × 200 , 5 ×...

The correct answer is (D) Two right angles.

(a) Yes. The sum of two acute angles may be less than a right angle.(b) Yes. The sum of two acute angles may be equal to a right angle.(c) Yes....

(a) Yes. The sum of two obtuse angles is always greater then 180°. (b) No. The sum of two obtuse angles is always greater than 180°, but less than 360°.

(i) No,  Two right angles would up to 180o.,So the third angle becomes zero. This is not possible, so a triangle cannot have two right angles. [Since sum of angles in...

Correct answer is (c) acute

Correct answer is  (c) Right-angled triangle 

It is possible to have a triangle in which two of the angles are obtuse. False

If hypotenuse and an acute angle of one right triangle are equal to the hypotenuse and an acute angle of another right triangle, then the triangles are congruent. True

Let x and y be the supplementary angles, where x > y.  As per the given condition  x + y = 1800 …….(i)  And x – y = 180 ……..(ii)  Adding (i) and (ii),...