Will mark the brainliest. needs to be handed in tomorrow.

Given : ABCF is a Rectangle

⇒ AB = CF

Given : AB = 6 cm

⇒ CF = 6 cm

Perimeter of a Rectangle is given by : 2(Length + Width)

Given : Perimeter of the Rectangle = 20 cm

⇒ 2(6 + BC) = 20

⇒ 6 + BC = 10

⇒ BC = 4

Given : BD = 9

But, We can See that : BD = BC + CD

⇒ CD + 4 = 9

⇒ CD = 5

We know that :

✿  

Where : a and b are Lengths of Parallel Sides and Height is Length between those Parallel Sides

In the Given Trapezium :

The Parallel Sides are CD and EF and Height is CF

Given : EF = 3 cm

step-by-step explanation: i dont

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.