The document describes a trapezoid with a circle inscribed within its parallel sides. The trapezoid has sides DE=3 and a 90 degree angle at both DEF and EFG. To calculate the area of the trapezoid, the document defines the points where the circle touches the sides of the trapezoid and sets up an equation relating the length of one of the trapezoid legs to the radius of the circle.

1. 080210191015
“math for internasional school”
Universitas jember

2.  A trapezoid DEFG with a circle in the
offensive four sides and of radius 2 and
centered at C. DE and GF side is the side that
is parallel to DE <GF and DE = 3. Known to
DEF = EFG = 90 . compute the trapezoidal
0
area?

4. Garis DG menyinggung di titik Z,
Garis GF menyinggung di titik Y,
Garis DE menyinggung di titik X, dan
Garis EF menyinggung di titik W.

5. dengan menganggap GZ=GY=k maka DGJ berlaku :
2 2
k 1 k 1 42 k 4
6 3
.4 18
2