Page 69 - What Where Why - 7

Mixed Bag
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Maths Quiz

1. Two supplementary angles are in the ratio 4 : 5. What are the angles?

(a) 100 and 80 (b) 80 and 100
(c) 120 and 60 (b) 60 and 120

2. Which of the following is not a necessary condition for adjacent angles?
(a) They have the same vertex. (b) They have a common arm.

(c) The sum of both is 180°.
(d) Their non-common arms are on either side of the common arm.

3. Which of the following statements is not true?

(a) A line AB is the same as line BA
(b) A line segment has no definite length.

(c) Two distinct points always determine a unique line.
(d) Two intersecting lines can not be both parallel to the same line.

4. What is the measure of an angle, if six times its complement is 12° less than twice its supplement?
(a) 48° (b) 45°

(c) 50° (d) 56°

5. In the figure ∠COD = 90°, ∠BOE = 72°, and AOB is a straight line, then C D

what is the measure of ∠BOD? O
x° y°
(a) 36° (b) 54° A 3x° 72° B
(c) 108° (d) 85° E

6. Which of the following statements is true?
(a) Two lines may intersect in two points.

(b) A ray has no end point.
(c) Three lines are concurrent if they have a common point.

(d) Open half line OA is the same thing as ray OA.

7. In the given figure, what is the measure of ∠BOD? C D
(a) 45° (b) 65° 65°
x° (2x–20)°
(c) 70° (d) 75° A O B

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