Question

please help me fast answer my questions please​

Answer 1

Answer:

a) proved

b) 84cm^2

c) 1/10.41

Step-by-step explanation:

a) If in tr.ABC , AD is per. to BC

We know that a median divides a a triangle into two equal parts

Then tr.ABD = tr.ACD

So ,

Squaring both sides

AB(1st tr.)+DC(2nd tr.)=AC(2nd tr.)+BD(1st tr.)

b) area = 1/2*base*height

or 1/2*base*24  

So as base is BC

then BC2 = AC2-AB2

BC2 = 625-576

or bc = 7cm

Now 1/2*7*24

or 84cm^2 (Ans)

c) 1/10.41