Discussion
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- Question
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
- Correct Answer
- 40
- 1. 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
- 2. 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
- 3. What is the measure of an interior angle of a regular decagon?
Options- A. 120°
- B. 140°
- C. 144°
- D. 150° Discuss
- 4. In a colored picture of blue and yellow color, blue and yellow color is used in the ratio of 4:3 respectively. If in upper half, blue : yellow is 2:3, then in the lower half blue : yellow is
Options- A. 1 : 1
- B. 2 : 1
- C. 26 : 9
- D. 9 : 26 Discuss
- 5. There are several peacocks and deers in a cage (with no other types of animals). There are 72 heads and 200 feet inside the cage. How many peacocks are there, and how many deers ?
Options- A. 42 & 24
- B. 38 & 26
- C. 36 & 24
- D. 44 & 28 Discuss
- 6. ? 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 Discuss
- 7. 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
- 8. 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
- 9. 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
- 10. 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
Area problems
Search Results
Correct Answer: 7
Correct Answer: 616 sq cm
Correct Answer: 144°
Correct Answer: 26 : 9
Correct Answer: 44 & 28
Explanation:
Let
x = peacocks
y = deers
2x + 4y = 200
x + y = 72
y = 72 - x
2x + 288 - 4x = 200
x = 44 peacocks
y = 28 deers
Correct Answer: 18
Correct Answer: 62
Correct Answer: (-0.5, -6)
Correct Answer: 8
Correct Answer: 21
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