The diagram shows a semicircle with diameter 9cm.
Calculate the total perimeter of this semicircle.
Give your answer in exact form.
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Circles, Arcs & Sectors
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Circles, Arcs & Sectors
The diagram shows a semicircle with diameter 9cm.
Calculate the total perimeter of this semicircle.
Give your answer in exact form.
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is a sector of a circle, centre .
The radius of the circle is 15 cm.
The angle of the sector is .
Calculate the area of sector .
Give your answer as a simplified expression in terms of .
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The diagram shows a sector of a circle of radius 7 cm.
Work out the length of arc .
Give your answer as a simplified expression in terms of .
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The region, shown shaded in the diagram, is a path.
The boundary of the path is formed by two semicircles, with the same centre , and two straight lines.
The inner semicircle has a radius of 7 metres.
The path has a width of 2 metres.
Work out the perimeter of the path.
Give your answer as a simplified expression in terms of .
...................................................... m
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A circle centre has radius 9 cm.
Calculate the perimeter of the shaded sector of the circle.
Give your answer as a simplified expression in terms of .
...................................................... cm
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The diagram shows two sectors of circles with the same centre. Calculate the shaded area.
Give your answer in terms of .
............................................. cm2
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The diagram shows a sector of a circle with radius 6 cm and sector angle 72°.
The perimeter of this sector is cm. Find the value of and the value of .
= ................................................
= ................................................
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The diagram shows a square inside a circle.
The points and lie on the circle.
The radius of the circle is 6 cm.
Work out the total area of the shaded regions.
Give your answer in terms of .
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is a sector of a circle, centre , radius 10 m.
is the tangent to the circle at point .
is the tangent to the circle at point .
Angle
Calculate the area of the shaded region. Give your answer as an exact value in terms of .
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OAB is the sector of a circle, centre O.
OB = 8 cm and angle AOB = 30°.
BP is perpendicular to OA.
Calculate AP.
Give your answer as an exact value.
AP = ........................................... cm
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Work out the area of the shaded region APB. Give your answer as an exact value in terms of .
.......................................... cm2
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is an arc of a circle, centre , radius 9 cm.
The length of the arc is cm.
The area of sector is cm2.
Find the value of .
= ..............................................
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The diagram shows an equilateral triangle ABC with sides of length 10 cm.
AMN is a sector of a circle, centre A.
M is the mid-point of AC.
Work out the area of the shaded region.
Give your answer as an exact value in terms of .
......................................... cm2
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The vertices of a square ABCD lie on the circumference of a circle, radius 8 cm. Calculate the area of the square.
......................................... cm2
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i) Calculate the area of the shaded segment. Give your answer as a simplified expression in terms of .
......................................... cm2 [3]
ii) Calculate the perimeter of the shaded segment. Give your answer as a simplified expression in terms of .
.......................................... cm [4]
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