Question

Abc is an isosceles triangle with AB=AC=23 cm and B=10 cm. calculate the length of the perimeter from A to BC (give your ans correct to decimal places)​

Answer 1

Step-by-step explanation:

Here altitude from A to BC is AD, we know in isosceles altitude on non equal sides also median,

so, BD=CD=

2

BC

=

2

14

=7cm

Now, we applying Pythagoras theorem in △ABD,

AB

2

=BD

2

+AD

2

(25)

2

=(7)

2

+AD

2

AD

2

=625−49

AD

2

=576

AD=24cm

∴ Altitude from A to BC=AD=24cm