Page 174 - Grade 10 C.Math

pbfx/0f 3 P S
;dfgfGt/ rt'e'{h PQRS sf] If]qkmn 48 ju{ ;]=ld= 5 .

olb PQR = 30° / PQ = 8cm eP QR sf] dfg
kTtf nufpg'xf];\ . 30°
Q R
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;dfwfg
oxfF ;dfgfGt/ rt'e'{h PQRS sf] If]qkmn (A) = 48 ju{ ;]=ld=

cyjf, PQR sf] If]qkmn + PRS sf] If]qkmn = 48 cm 2

cyjf, 2PQR sf] If]qkmn = 48cm
2
cyjf, PQR sf] If]qkmn =  x'G5 .

cyjf, r.p.sinQ = 24 cm 2

cyjf, .8cm.p.Sin 30° = 24cm 2

cyjf 4P. cm = 24 cm 2

cyjf, p.2cm = 24cm 2

cyjf,  

ct M p = QR = 12 cm
P
pbfx/0f 4

;Fu}sf] lrqdf PQ = 12 cm, QR = , PS = 18 cm, 18 cm
Q = 60° / S = 30° / PRS sf] If]qkmn PQR sf]

If]qkmnsf] eP RS sf] gfk kTtf nufpg'xf];\ . 60° 30° S
Q
R
;dfwfg

oxfF, PQ = 12 cm , QR = , PS = 18 cm, Q = 60° / S = 30° 5 .

t;y{, PQR sf] If]qkmn = . PQ. QR. Sin60° ju{ PsfO

= 12 x . cm

= 3 x 16 x 3 cm 2

= 144 cm 2

171 ul0ft, sIff – 10