This document discusses the areas of rectangles and triangles. It states that the area of a rectangle is equal to its length multiplied by its breadth. The area of a triangle is equal to one-half of the base multiplied by the height. It then demonstrates that if a line is drawn within a rectangle connecting one vertex to the opposite side, the area of the resulting triangle will be half the area of the original rectangle.

1. WELCOME

2. PRESENTED BY
REKHA RANI. T
MATHEMATICS
REG. No. 13973012
KUCTE KOLLAM

3. Name of the Teacher : REKHA RANI. T
Standard : IX
Subject : Mathematics
Unit : Area
Topic : Rectangle and Triangle

4. RECTANGLE AND TRIANGLE

5. A
C
D
B
Area Of Rectangle = Length x Breadth

6. h
C
A B
b
AREA OF TRIANGLE = ½ x b x h

7. P C
Area of the rectangle = AB X AD
Area of the triangle = ½ X AB X PQ
= ½ X AB X AD
= half the area of the rectangle
D
A Q
B

8. P
D C
A B
Q
Area of the rectangle = AB X AD
Area of the triangle = ½ X AB X PQ
= ½ X AB X AD
= half the area of the rectangle

9. If ABCD is a rectangle and if we
draw or join a line from any point
on the side DC to the vertices A
and B, then the area of the
triangle formed will be half the
area of that rectangle.