Title Additional Problames_221-244.pdf ✅

VIII - Mathematics (Vol-3) [e-Techno TEX BOOK] 222 3. [4]   2 2 0 2 0 2 a d cos 48 cos 12   4. [3]   1 2 1 1 t x tx x t t      ;   1 2 1 1 t y ty y t t      5. [2]   1 2 1 1 t x tx x t t      ;   1 2 1 1 t y ty y t t      ; 1-t> 0,t>0 6. [2] AB  2 , AC=2, BC  2 CO-ORDINATE GEOMETRY WORKSHEET-2 1. P,Q,R are the midpoints of AB, BC, CA of ABCand the area of ABCis 20. The area of PQR is 1) 4 sq. units 2) 5 sq. units 3) 6 sq. units 4) 8 sq. units 2. If the area of triangle fromed by joining the midpoints of the sides of ABCis 5 sq. unit, then the area of ABCis. 1) 40 sq. unit 2) 20 sq. unit 3) 10 sq. unit 4) 50 sq. unit 3. If D,E,F are the midpoints of the sides BC,CA,AB OF ABCwhere A 3,4    , B 1, 2     , C=(5,6) then the area of DEF 1) 19 sq.unit 3 2) 13 sq.unit 2 3) 17 sq.unit 3 4) 17 sq.unit 2 4. If 1 is the area of the triangle formed by the centroid and two verices of a triangles, 2 is the area of the triangle formed by the midpoints of the sides of the given triangle then 1 2  : = 1) 3 : 4 2) 4 : 1 3) 4 : 3 4) 2 : 1 5. If A 6,3 ,B 3,5 ,C 4,2      , P  , then the ratio of the areas of the triangles PBC, ABC are is 1)    : 7 2)    : 7 3)     2 : 7 4) 3 14 : 7    