Discussion
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- Question
? XYZ is right angled at Y. If m?Z = 30°. What is the length of YZ (in cm), if ZX = 9 cm?
Options- A. 6?3
- B. 9?3/2
- C. 3?3
- D. 18
- Correct Answer
- 9?3/2
- 1. D and E are points on side AB and AC of ?ABC. DE is parallel to BC. If AD:DB = 1:2 and area of ?ABC is 45 sq cm, what is the area (in sq cm) of quadrilateral BDEC?
Options- A. 20
- B. 40
- C. 15
- D. 30 Discuss
- 2. If ax - 4y = -6 has a slope of -3/2. What is the value of a?
Options- A. 6
- B. 3
- C. -6
- D. -3 Discuss
- 3. The co-ordinates of the centroid of a triangle ABC are (2 , 2). What are the co-ordinates of vertex C if co-ordinates of A and B are (7 , -1) and (1 , 2) respectively?
Options- A. (-2 , 5)
- B. (2 , 5)
- C. (-2 , -5)
- D. (2 , -5) Discuss
- 4. What is the reflection of the point (-3, 1) in the line x = -2?
Options- A. (-1 , 1)
- B. (-3 , -5)
- C. (1 , 1)
- D. (-3 , 5) Discuss
- 5. ABC is a right angled triangle with angle A = 90 deg. Then the value of cos2A+cos2B+cos2C is
Options- A. 2
- B. 1
- C. 0
- D. 3 Discuss
- 6. Triangle ?XYZ is similar to ?PQR. If XY:PQ=5:1. If Area of ?PQR is 5 sq cm, what is the area (in sq cm) of ?XYZ?
Options- A. 125
- B. 120
- C. 100
- D. 64 Discuss
- 7. If the length of a chord of a circle is equal to that of the radius of the circle, then the angle subtended, in radians, at the centre of the circle by chord is
Options- A. 1
- B. ?/2
- C. ?/3
- D. ?/4 Discuss
- 8. In ?ABC, ?B is right angle, D is the mid point of the side AC. If AB = 6 cm, BC = 8cm, then the length of BD is
Options- A. 4 cm
- B. 5 cm
- C. 8 cm
- D. 12 cm Discuss
- 9. AB is a chord of the circle and its center is ?O?. ON is perpendicular to AB. If the length of AB=20 cm, ON-(2?11) cm, find the radius (in cm) of the circle.
Options- A. 10
- B. 12
- C. 13
- D. 15 Discuss
- 10. The largest chord of the circle has a length of 20.4 cm. The radius of the circle will be _____.
Options- A. 10.2 cm
- B. > 10.2 cm
- C. >=10.2 cm
- D. <10.2 cm Discuss
Volume and Surface Area problems
Search Results
Correct Answer: 40
Correct Answer: -6
Correct Answer: (-2 , 5)
Correct Answer: (-1 , 1)
Correct Answer: 1
Correct Answer: 125
Correct Answer: ?/3
Correct Answer: 5 cm
Correct Answer: 12
Correct Answer: 10.2 cm
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