EXAMPLES
Ex 1:Name all the angles formed in
the figure:
Sol:Clearly, there are three
angles formed in the figure.
The angles are ∠AOB, ∠BOC and ∠AOC.
Ex 2:In the figure, write another
name for the following angles:
(i) ∠1
(ii) ∠2
(iii) ∠3
(iv) ∠4
(v) ∠5
Sol:
(i) ∠DAE or ∠EAD
(ii) ∠BAC or ∠CAB
(iii) ∠ACD or ∠DCA
(iv) ∠CDA or ∠ADC
(v) ∠AFE or ∠EFA
Ex 3:In the figure, name the points
which are:
(i) in the interior of ∠PQR
(ii) in the exterior of ∠PQR
(iii) on ∠PQR
Sol:
(i) Points A, D and F are in the interior of ∠PQR.
(ii) Points B and C are in the exterior of ∠PQR.
(iii) Points P, G, Q, E and R are on ∠PQR.