ABC is an isosceles triangle in which altitudes BE and CF are drawn to equal sides AC and AB respectively (see Fig. 7.31). Show that these altitudes are equal.

In ∆AEB and ∆AFC,
∠AEB and ∠AFC (Each 90º) A
=∠A (Common angle)
AB = AC (Given)
∠∆AEB ∠∆AFC (By AAS congruence rule)
∴ BE = CF (By CPCT)
Section | Number of girls per thousand boys |
|---|---|
Scheduled Caste (SC) | 940 |
Scheduled Tribe (ST) | 970 |
Non-SC/ST | 920 |
Backward districts | 950 |
Non-backward districts | 920 |
Rural | 930 |
Urban | 910 |
(i) Represent the information above by a bar graph.
(ii) In the classroom discuss what conclusions can be arrived at from the graph.

