WISKUNDE
GRAAD 11
NOG OEFENINGE
Raaklyn koord stelling.
MATHEMATICS
GRADE 11
MORE EXERCISES
Tan-chord theorem.
Vraag / Question 1.
Voltooi die volgende bewering: Die hoek tussen 'n raaklyn aan 'n sirkel en die koord deur die raakpunt . .
Complete the following statement: The angle between the tangent to a circle and the chord through the poin of contact . .
Beskou meegaande skets en voltooi dan die volgende bewerings :
Consider the accompanying diagram and then complete the following statements :
1.1
∠PQT = . . .
1.2
∠PQV = . . .
1.3
∠QVS = . . .
1.4
∠QSV = . . .
Vraag / Question 2.
In die diagram is ABC 'n raaklyn aan sirkel O.
In the diagram ABC is a tangent to circle O.
∠DBC = 34°
Bereken / Calculate :
1.1
∠BOD
1.2
∠BED
Vraag / Question 3.
In die diagram is AE en BF raaklyne.
In the diagram AE and BF are tangents to the circle.
∠DAE = 38°, ∠DBC = 22°
∠CBF = 50°
Bereken die hoeke van vierhoek ABCD. /
Calculate the angles of quadrilateral ABCD.
Vraag / Question 4.
In die diagram is APB, AQC en BRC raaklyne
aan die sirkel.
∠A = 50° en ∠C = 48°.
Vind die hoeke van ΔPQR / Calculate the angles of ΔPQR.
In the diagram APB, AQC and BRC are tangents
to the circle.
∠A = 50° and ∠C = 48°.
Calculate the angles of ΔPQR.
Vraag / Question 5.
In die diagram is ABC 'n raaklyn.
en BE || CD.
In the diagram ABC is a tangent
and BE || CD.
Bewys dat / Prove that ∠DCB = ∠BDE
Vraag / Question 6.
In die skets is AF 'n raaklyn en AF || BD.
In the diagram AF is a tangent and AF || BD.
Bewys dat / Prove that ∠AEB = ∠ABD
Vraag / Question 7.
In die skets is CD 'n raaklyn en
∠D = ∠ACB = x
In the diagram CD is a tangent and
∠D = ∠ACB = x
Bewys dat AC 'n middellyn= is /
Prove that AC is a diameter.
Vraag / Question 8.
In die skets is KL en KM raaklyne.
In the diagram KL and KM are tangents.
Bewys dat / Prove that ∠K = ∠LNM − ∠P
Vraag / Question 9.
In die skets is PB 'n raaklyn, PB = PR en
∠APB = 20° en ∠APR = 70°
In the diagram PB is a tangent, PB = PR and
∠APB = 20° and ∠APR = 70°
Bereken ∠ABP / Calculate ∠ABP
Vraag / Question 10.
In die skets is O die middelpunt van die sirkel,
ED || AC, boog BC = boog CD en ∠BOD = 112°
In the diagram O is the centre of the circle,
ED || AC, arc BC = arc CD and ∠BOD = 112°
Bereken die grootte van / Calculate the size of
10.1
∠BAS
10.2
∠ADE
Vraag / Question 11.
In die skets is BE 'n raaklyn,
DA halveer ∠CAB, AD || BE en ∠ABE = x
In the diagram BE is a tangent,
DA bisects ∠CAB, AD || BE and ∠ABE = x
11.1
Vind sewe ander hoeke, elk gelyk aan x.
Gee redes.
Find seven other angles, each equal to x.
Give reasons.
11.2
Bewys / Prove that
11.2.1
DC is 'n raaklyn aan sirkel FAC. / DC is a tangent to ircle FAC
11.2.2
ADBE is 'n paralellogram. / a paralellogram.
Vraag / Question 12.
In die skets is PA en PB raaklyne.
AC is 'n middellyn en ∠ACB = x
In the diagram PA and PB are tangents.
AC is a diameter and ∠ACB = x
12.1
Gee, met redes, twee ander hoeke gelyk aan x.
Write downtwo other angles equal to x and give reasons.
12.2
Druk ∠K in terme van x uit. /
Express ∠K in terms of x.
12.3
Bewys / Prove AP = PK.
Vraag / Question 13.
In die skets is TQA 'n raaklyn, ∠PQT = x,
∠RQA = y, PQ = PR en SP = SR
In the diagram TQA is a tangent, ∠PQT = x,
∠RQA = y, PQ = PR en SP = SR
13.1
Bewys / Prove
13.1.1
∠QRA = x
13.1.2
∠PSR = 180° − x
13.2
Gee drie ander hoeke gelyk aan y. / Find three
other angles equal to y.
13.3
Bereken die waardes van x en y. / Calculate the values of x and y.