Choose the correct one.
In a right-angled triangle, the angles other than the right angle are
(a) obtuse (b) right (c) acute (d) straight
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Can we have two acute angles whose sum is(a) an acute angle? Why or why not?
(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....
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Can two angles be supplementary if both of them are: (i) acute (ii) obtuse (iii) right?
(i)No, because sum of two acute angles is less than 180°. (ii) No, because sum of two obtuse angles is more than 180°. (iii) Yes, because sum of two right angles is...
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Can a triangle have: (i) Two right angles? (ii) Two obtuse angles?
(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...
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In a triangle, one angle is of 90°. Then (i) The other two angles are of 45° each (ii) In remaining two angles, one angle is 90° and other is 45°
Correct answer is (c) (iii) only
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Choose the correct one. Lengths of sides of a triangle are 3 cm, 4 cm and 5 cm. The triangle is (a) Obtuse angled triangle (b) Acute-angled triangle
Correct answer is (c) Right-angled triangle
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Choose the correct one. If one angle of a triangle is equal to the sum of the other two angles, the triangle is
Correct answer is (c) right
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Choose the correct one. If one of the angles of a triangle is 110°, then the angle
Correct answer is (d) 145°
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Choose the correct one.In a right-angled triangle ABC, if angle B = 90°, BC = 3 cm and AC = 5 cm, then the length of side AB is
Correct answer is (b) 4 cm
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Choose the correct one. In a right-angled triangle ABC, if angle B = 90°, then which of the following is true?
Correct answer is (b) AC2 = AB2 + BC2
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If hypotenuse and an acute angle of one right triangle are equal to the hypotenuse and an acute angle of another right triangle,
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
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