Algebraic Expressions and Geometry, grade 9, question 1
- (x>0) ; S represents the area of rectangle ABCD and S’ represents the area of trapezoid EFCD.
- Express S in terms of x.
- Prove that S’ = (x+2)(6-x).
- Calculate x if S’ = 12.
- In what follows x = 2
- Calculate ED and EG.
- Verify that triangle GEF is a reduction of triangle GDC with scale factor and center to be determined.