Class 10 Exam > Class 10 Notes > Viva Voce: Areas of Sectors formed at the Vertices of a Triangle
Viva Voce: Areas of Sectors formed at the Vertices of a Triangle - Class 10 PDF Download
Q.1. What is the sum of angles of four sectors of same radii ‘r’ formed at the vertices (as centre) at any quadrilateral?
360°
Q.2. What is the area of a semicircle of radius 2 cm?
2π
Q.3. What is the difference between a sector and a segment of a circle?
A sector of a circle is formed by an arc and two radii of the circle, while a segment is one of its part in which a chord divides a circle.
Q.4. “A tangent intersects the circle in more than one point”. Is the statement true or false?
False
Q.5. What is the angle subtended by a circle at centre?
360°
Q.6. If the perimeter of semicircle is 12 cm, find its radius.
7/3 cm
Q.7. Define a segment of a circle.
A chord divides a circle in two parts each of which is called a segment of a circle.
Q.8. Define chords.
A line segment joining two points on the circumference of a circle is known as a chord.
Q.9. Area of the sector of a circle with radius 4 cm and angle 30° is
4.19 cm
Q.10. △ABC is an equilateral triangle. If each sector at the three vertices is of radius r cm, calculate the total area of the sectors.
3 x θ/360° x πr2
= 3 x 60°/360° x πr2
= 1/2πr2
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Mar 16, 2025
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