If two adjacent angles are complementary they form a right angle. Solution: True Since, 90° + 90° = 180°, a supplementary angle. If one of the angles of a triangle is obtuse, the other two angles of a triangle must be acute. Straight Angle 2. Two acute angles form a linear pair. Examples of obtuse angles are: 100°, 120°, 140°, 160°, 170° etc. As one acute angle and one obtuse angle can make two supplementary angles. no because supplementary means when 2 angles equal 180 degrees. If the sum of two angles is an obtuse angle, at least one of the angles must be ___ a. acute. Other resources: Angles - Problems with Solutions Types of angles Parallel lines cut by a transversal Test. An obtuse triangle is ___ isosceles. 3. Grade 7 Maths Lines and Angles … Two angles are said to be supplementary angles when they add up to 180 degrees. Question 62. An equilateral triangle cannot be obtuse. The bisectors of two supplementary angles are ___ perpendicular to each other. Both of the angles are right angles. Two obtuse angles form a linear pair. An obtuse angle is a type of angle whose degree measurement is more than 90° but less than 180°. but an acute angle is always less than 90 degrees, so two acute angles cannot add up to equal 180 degrees/be supplementary. 5. Solution: True. As each of the angle is $$<90^0$$.So, the sum of two acute angles is always less than $$ 180^0$$.Hence they cannot form pair of supplementary angles. As supplementary angle means 180 the sum total of 89 and 91 is 180. The angle opposite to the obtuse angle is the longest side of the triangle. Obtuse Angle. Two right angles are always supplementary to each other. The angle supplementary to ∠1 is ∠6. Answer: Yes . This means that ∠A + ∠B = 180°. (a) One obtuse angle and one acute angle (b) One reflex angle and one acute angle (c) Two obtuse angles (d) Two right angles Solution: (d) Because sum of two right angles is equal to 180°. asked Jun 2, 2020 in Lines and Angles by Subnam01 ( 52.0k points) lines and angles • An obtuse angle … 4. This is the only angle marked that is acute. ∠1 is an obtuse angle, and any one acute angle, paired with any obtuse angle are supplementary angles. Obtuse Angle … View Full Answer Its FREE, you're just one … One obtuse angle and one acute angle can make a pair of supplementary angles. Question 61. One obtuse angle and one acute angle can make a pair of supplementary angles. Always. Take acute angle as 89 and obtuse angle as 91. • A right angle is equal to 90°. Note: • An acute angle is less than 90°. One of its angles is an acute angle and another angle is an obtuse angle. ∠ PQR is an obtuse angle because its less than 180° and greater than 90°. Two angles are supplementary, if. 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