iiaeaaercoororecaiieaerananere · In the diagram, the circle has centre O and radius 5cm. The...

3

In the diagram, OPQ is a sector of a circle, centre O and radius r cm. Angle QOP � θ radians. Thetangent to the circle at Q meets OP extended at R.

(i) Show that the area, A cm2, of the shaded region is given by A � 12r2(tan θ � θ). [2]

(ii) In the case where θ � 0.8 and r � 15, evaluate the length of the perimeter of the shaded region.[4]

9709/1/O/N/02

CIRCULAR MEASURE (RADIANS) AS MATHS - -

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CIRCULAR MEASURE (RADIANS) CLASSIFIED AS MATHS - Page 1 -

Visit: --> www.fastexampapers.com for more classified papers and answer keys

9

The diagram shows a semicircle ABC with centre O and radius 8 cm. Angle AOB = θ radians.

(i) In the case where θ = 1, calculate the area of the sector BOC. [3]

(ii) Find the value of θ for which the perimeter of sector AOB is one half of the perimeter ofsector BOC. [3]

(iii) In the case where θ = 13π, show that the exact length of the perimeter of triangle ABC is(24 + 8

√3) cm. [3]

9709/01/M/J/03

CIRCULAR MEASURE (RADIANS) AS MATHS - -

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CIRCULAR MEASURE (RADIANS) CLASSIFIED AS MATHS - Page 2 -


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CIRCULAR MEASURE (RADIANS) CLASSIFIED AS MATHS - -


3

6

The diagram shows the sector OPQ of a circle with centre O and radius r cm. The angle POQ isθ radians and the perimeter of the sector is 20 cm.

(i) Show that θ = 20r

− 2. [2]

(ii) Hence express the area of the sector in terms of r. [2]

(iii) In the case where r = 8, find the length of the chord PQ. [3]

9709/01/O/N/03 [Turn over

CIRCULAR MEASURE (RADIANS) AS MATHS - Page 3 -

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5

In the diagram, OCD is an isosceles triangle with OC = OD = 10 cm and angle COD = 0.8 radians.The points A and B, on OC and OD respectively, are joined by an arc of a circle with centre O andradius 6 cm. Find

(i) the area of the shaded region, [3]

(ii) the perimeter of the shaded region. [4]

9709/01/M/J/04


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3

In the diagram, AC is an arc of a circle, centre O and radius 6 cm. The line BC is perpendicular toOC and OAB is a straight line. Angle AOC = 1

3π radians. Find the area of the shaded region, giving

your answer in terms of π and√

3. [5]

9709/01/O/N/04


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8

In the diagram, ABC is a semicircle, centre O and radius 9 cm. The line BD is perpendicular to thediameter AC and angle AOB = 2.4 radians.

(i) Show that BD = 6.08 cm, correct to 3 significant figures. [2]

(ii) Find the perimeter of the shaded region. [3]

(iii) Find the area of the shaded region. [3]

© UCLES 2005 9709/01/M/J/05 [Turn overCIRCULAR MEASURE (RADIANS) AS MATHS - Page 6 -

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2

In the diagram, OAB and OCD are radii of a circle, centre O and radius 16 cm. Angle AOC =α radians.AC and BD are arcs of circles, centre O and radii 10 cm and 16 cm respectively.

(i) In the case where α = 0.8, find the area of the shaded region. [2]

(ii) Find the value of α for which the perimeter of the shaded region is 28.9 cm. [3]

© UCLES 2005 9709/01/O/N/05


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7

The diagram shows a circle with centre O and radius 8 cm. Points A and B lie on the circle. Thetangents at A and B meet at the point T , and AT = BT = 15 cm.

(i) Show that angle AOB is 2.16 radians, correct to 3 significant figures. [3]

(ii) Find the perimeter of the shaded region. [2]


© UCLES 2006 9709/01/M/J/06 [Turn overCIRCULAR MEASURE (RADIANS) AS MATHS - Page 8 -

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3

In the diagram, AOB is a sector of a circle with centre O and radius 12 cm. The point A lies on theside CD of the rectangle OCDB. Angle AOB = 1

3π radians. Express the area of the shaded region in

the form a(√3) − bπ, stating the values of the integers a and b. [6]

© UCLES 2006 9709/01/O/N/06


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5

In the diagram, OAB is a sector of a circle with centre O and radius 12 cm. The lines AX and BX aretangents to the circle at A and B respectively. Angle AOB = 1

3π radians.

(i) Find the exact length of AX, giving your answer in terms of√

3. [2]

(ii) Find the area of the shaded region, giving your answer in terms of π and√

3. [3]

© UCLES 2007 9709/01/M/J/07


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7

In the diagram, AB is an arc of a circle, centre O and radius r cm, and angle AOB = θ radians. Thepoint X lies on OB and AX is perpendicular to OB.

(i) Show that the area, A cm2, of the shaded region AXB is given by

A = 12r2(θ − sin θ cos θ). [3]

(ii) In the case where r = 12 and θ = 16π, find the perimeter of the shaded region AXB, leaving your

answer in terms of√

3 and π. [4]

© UCLES 2007 9709/01/O/N/07 [Turn over


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5

O

Q

TP 12 cm

5 cm

The diagram shows a circle with centre O and radius 5 cm. The point P lies on the circle, PT is atangent to the circle and PT = 12 cm. The line OT cuts the circle at the point Q.

(i) Find the perimeter of the shaded region. [4]

(ii) Find the area of the shaded region. [3]

© UCLES 2008 9709/01/M/J/08


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6

9 cm

O

QP

T

5 cm

In the diagram, the circle has centre O and radius 5 cm. The points P and Q lie on the circle, and thearc length PQ is 9 cm. The tangents to the circle at P and Q meet at the point T . Calculate

(i) angle POQ in radians, [2]

(ii) the length of PT , [3]

(iii) the area of the shaded region. [3]



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5

A BR

1

R2

radq

O

The diagram shows a circle with centre O. The circle is divided into two regions, R1

and R2, by the

radii OA and OB, where angle AOB = θ radians. The perimeter of the region R1

is equal to the length

of the major arc AB.

(i) Show that θ = π − 1. [3]

(ii) Given that the area of region R1

is 30 cm2, find the area of region R2, correct to 3 significant

figures. [4]

© UCLES 2009 9709/01/M/J/09


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5

A

B

CDO6 cm

The diagram shows a semicircle ABC with centre O and radius 6 cm. The point B is such that

angle BOA is 90◦ and BD is an arc of a circle with centre A. Find

(i) the length of the arc BD, [4]

(ii) the area of the shaded region. [3]

© UCLES 2009 9709/11/O/N/09


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7

A

B

C

D

E

F

O

10 cm

12 cm

The diagram shows a metal plate ABCDEF which has been made by removing the two shaded regions

from a circle of radius 10 cm and centre O. The parallel edges AB and ED are both of length 12 cm.

(i) Show that angle DOE is 1.287 radians, correct to 4 significant figures. [2]

(ii) Find the perimeter of the metal plate. [3]

(iii) Find the area of the metal plate. [3]

© UCLES 2010 9709/13/M/J/10 [Turn over


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8A B

CD

P

Q

The diagram shows a rhombus ABCD. Points P and Q lie on the diagonal AC such that BPD is an

arc of a circle with centre C and BQD is an arc of a circle with centre A. Each side of the rhombus

has length 5 cm and angle BAD = 1.2 radians.

(i) Find the area of the shaded region BPDQ. [4]

(ii) Find the length of PQ. [4]



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9

2 cm

8 cm

R S

Q

P

T

C1

C2

The diagram shows two circles, C1

and C2, touching at the point T . Circle C

1has centre P and radius

8 cm; circle C2

has centre Q and radius 2 cm. Points R and S lie on C1

and C2

respectively, and RS is

a tangent to both circles.

(i) Show that RS = 8 cm. [2]

(ii) Find angle RPQ in radians correct to 4 significant figures. [2]


© UCLES 2010 9709/11/O/N/10


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iiaeaaercoororecaiieaerananere · In the diagram, the circle has centre O and radius 5cm. The...

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