Choose the correct one.
If the exterior angle of a triangle is 130° and its interior opposite angles are equal, then measure of each interior opposite angle is
(a) 55° (b) 65° (c) 50° (d) 60°
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(a) Is it possible to have a regular polygon with measure of each exterior angle as 22°? (b) Can it be an interior angle of a regular polygon? Why?
The sum of all exterior angles of all polygons is 360º. Also, in a regular polygon, each exterior angle is of the same measure. Hence, if 360º is a perfect...
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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 in an isosceles triangle, each of the base angles is 40°, then the triangle is
Correct answer is (c) Obtuse 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 ΔPQR, if ∠ P = 60°, and ∠ Q = 40°, then the exterior angle formed by producing QR is equal to
Correct answer is (c) 100°
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Fill in the blanks to make the statements true. The sum of an exterior angle of a triangle and its adjacent angle is always _____.
The sum of an exterior angle of a triangle and its adjacent angle is always a right angle.
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State whether the statements are True or False. If two angles of a triangle are equal, the third angle is also equal to each of the other two angles.
If two angles of a triangle are equal, the third angle is also equal to each of the other two angles. False
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State whether the statements are True or False. If two angles and a side of a triangle are equal to two angles and a side of another triangle,
If two angles and a side of a triangle are equal to two angles and a side of another triangle, then the triangles are congruent. False
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