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Lines and Angles

Multiple Choice Questions

131. In the following figure, a transversal n intersects two parallel lines l and m at points G and H respectively. The angles formed are marked. If ∠1 is an acute angle, tell which of the following statements is false?

∠1 + ∠2 = 180°
∠2 + ∠5 = 180°
∠3 + ∠8 = 180°
∠3 + ∠8 = 180°

∠3 + ∠8 = 180°

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132. In the following figure, a transversal C intersects two parallel lines a and b at points A and B. The angles formed at A and B have been marked. Tell which pair of angles need not be equal?

∠1, ∠2
∠1, ∠3
∠1, ∠5
∠1, ∠5

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133. Which of the following is not a pair of complementary angles?

60°, 30°
56°, 34°
0°, 90°
0°, 90°

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134. Which of the following is not a pair of supplementary angles?

90°, 90°
32°, 58°
0°, 180°
0°, 180°

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135. If m a triangle, the measures of two angles are 90° and 30°, then the measure of the third angle is

90°
30°
60°
60°

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136. The ratio of the measures of the three angles of a triangle is 2 : 3 : 4. The measure of the largest angle is

80°
60°
40°
40°

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137. The measure of each angle of an equilateral triangle is

90°
30°
45°
45°

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138. The ratio of the four angles of a quadrilateral is 1 : 2 : 3 : 4. The measure of its smallest angle is

120°
36°
18°
18°

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139. In the figure given below, the side BC of ∆ABC is extended upto D. If ∠A = 55° and ∠B = 60°, then the measure of ∠ACD is

120°
110°
115°
115°

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140. The sum of all interior angles of a hexagon is

720°
360°
540°
540°

99 Views