Question

find the area of quadrilateral ABCD whose vertices are respectively a(1, 1 )b
( 7 - 3) C( 12 2)d(7 21)

Answer 1

In quadrilateral draw diagonal that is join A and C then two triangles will be formed then in both triangles use the formula. Area of triangle = ( 1/2×x1(y2-y3)+x2(y3-y1)+x3(y1-y2))
After finding area of both triangle separately add both the areas then you will find the area of quadrilateral ABCD

COORDINATE GEOMETRY
CHAPTER-7

Answer 2

Answer:

pls, find the attachment below

Area of tri ABC;

25

Area of triADC;

107

Area of quadABCD;

107 + 25 = 132 unit/cm.