Question

explain graphical method with one example

Answer 1

Answer:

Graphical Method Examples

Example 1: The path of highway number 1 is given by the equation x + y = 7 and the highway number 2 is given by the equation 5x + 2y = 20. Represent these equations geometrically. Plot the points A (1, 6), B(4, 3) and join them to form a line AB. Similarly, plot the points C(2, 5).

Answer 2

Answer:

Given: In △ABC,D and E are midpoints of AB and AC respectively,

i.e., AD=DB and AE=EC

To Prove: DE∥BC

Proof:

Since, AD=DB

∴DBAD=1............(1)

Also,

AE=EC

∴ECAE=1............(2)

From (1) and (2),

DBAD = ECAE =1

i.e.,DBAD = ECAE

∴ By converse of Basic Proportionality theorem,

DE∥BC