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Answers
EXPLANATION.
(1) Chord and sector of a circle.
Chord : A line segment joining the two points on the circumference of the circle is called chord.
As we know that,
Diameter of the longest chord of the circle which passes through the center of circle.
Formula of length of chord.
Chord length = 2 x √(r² - d²).
Sector of a circle : It is a part of the circle which is made by the arc of circle with two radii called sector of a circle.
Formula of the sector of the circle.
A = (θ/360°) x πr².
(2) Its area of the circle = 314 sq cm.
As we know that,
Formula of area of circle.
⇒ πr² = 314.
⇒ 3.14 x r² = 314.
⇒ (314/100) x r² = 314.
⇒ r²/100 = 1.
⇒ r² = 100.
⇒ r = √100.
⇒ r = 10 cm.
Radius of the circle = 10 cm.
Answer:
(1) Chord and sector of a circle.
Chord : A line segment joining the two points on the circumference of the circle is called chord.
As we know that,
Diameter of the longest chord of the circle which passes through the center of circle.
Formula of length of chord.
Chord length = 2 x √(r² - d²).
Sector of a circle : It is a part of the circle which is made by the arc of circle with two radii called sector of a circle.
Formula of the sector of the circle.
A = (θ/360°) x πr².
(2) Its area of the circle = 314 sq cm.
As we know that,
Formula of area of circle.
⇒ πr² = 314.
⇒ 3.14 x r² = 314.
⇒ (314/100) x r² = 314.
⇒ r²/100 = 1.
⇒ r² = 100.
⇒ r = √100.
⇒ r = 10 cm.
Radius of the circle = 10 cm.
(1) Chord and sector of a circle.
Chord : A line segment joining the two points on the circumference of the circle is called chord.
As we know that,
Diameter of the longest chord of the circle which passes through the center of circle.
Formula of length of chord.
Chord length = 2 x √(r² - d²).
Sector of a circle : It is a part of the circle which is made by the arc of circle with two radii called sector of a circle.
Formula of the sector of the circle.
A = (θ/360°) x πr².
(2) Its area of the circle = 314 sq cm.
As we know that,
Formula of area of circle.
⇒ πr² = 314.
⇒ 3.14 x r² = 314.
⇒ (314/100) x r² = 314.
⇒ r²/100 = 1.
⇒ r² = 100.
⇒ r = √100.
⇒ r = 10 cm.
Radius of the circle = 10 cm.
Step-by-step explanation: