Discussion
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- Question
? DEF is right angled at E. If m?D = 30°, what is the length of DE (in cm), if EF = 6?3 cm?
Options- A. 18
- B. 12?3
- C. 18?3
- D. 12
- Correct Answer
- 18
- 1. What is the measure (in degree) of an exterior angle of a regular polygon of 9 sides?
Options- A. 36
- B. 40
- C. 30
- D. 24 Discuss
- 2. If the radius of a circumscribed circle in an equilateral triangle is 14 cm. Then what will be the radius (in cm) of the inscribed circle?
Options- A. 7
- B. 14
- C. 28
- D. 35 Discuss
- 3. The perimeter of a right-angled triangle is k times the shortest side. If the ratio of the other side to hypotenuse is 4 : 6, then what is the value of k?
Options- A. 2
- B. 3
- C. 4
- D. 5 Discuss
- 4. The circumference of a circle is 88 cm, find its area?
Options- A. 616 sq cm
- B. 308 sq cm
- C. 154 sq cm
- D. 77 sq cm Discuss
- 5. What is the measure of an interior angle of a regular decagon?
Options- A. 120°
- B. 140°
- C. 144°
- D. 150° Discuss
- 6. The length and breadth of a rectangle are 24 cm and 7 cm respectively. Calculate its perimeter (in cm).
Options- A. 124
- B. 48
- C. 62
- D. 96 Discuss
- 7. What is the reflection of the point (-0.5, 6) in the x-axis?
Options- A. (0.5, -6)
- B. (-6, -0.5)
- C. (6, -0.5)
- D. (-0.5, -6) Discuss
- 8. The areas of two similar triangles ?ABC and ?PQR are 36 sq cms and 9 sq cms respectively. If PQ = 4 cm then what is the length of AB (in cm)?
Options- A. 16
- B. 12
- C. 8
- D. 6 Discuss
- 9. If the perimeter of a semi-circle is 108 cm, then find its radius (in cm).
Options- A. 42
- B. 28
- C. 56
- D. 21 Discuss
- 10. If the length of the side of an equilateral triangle is 8 cm, what is its area?
Options- A. 32?3 sq cm
- B. 16 sq cm
- C. 16?3 sq cm
- D. 32 sq cm Discuss
Area problems
Search Results
Correct Answer: 40
Correct Answer: 7
Correct Answer: 4
Correct Answer: 616 sq cm
Correct Answer: 144°
Correct Answer: 62
Correct Answer: (-0.5, -6)
Correct Answer: 8
Correct Answer: 21
Correct Answer: 16?3 sq cm
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