Question

the qualily and quantity, of energy we
put forth
diredly impad! the result
Do Intro
gative
​

Answer 1

Answer:

he is a good time to time constraints on a regular thing to do the work is licensed

Explanation:

The area of Δ ADC= 60 square cm.

Explanation:

Since we have given that

BC=12

BD=3

DC=BC-BD=12-3=9

So, BD:DC=3:9=1:3

So, we can let

BD=x and DC=3x

Now,

\frac{\Delta ABD}{\Delta ADC}=\frac{\frac{1}{2}\times x\times h}{\frac{1}{2}\times 3x\times h}=\frac{1}{3}

ΔADC

ΔABD

=

2

1

×3x×h

2

1

×x×h

=

3

1

So,

\begin{gathered}3ABD=ADC\\\end{gathered}

3ABD=ADC

Now,

\begin{gathered}\Delta ABD+\Delta ADC=\Delta ABC\\\\\frac{\Delta ADC}{3}+\Delta ADC=\Delta ABC\\\\\frac{4\Delta ADC}{3}=80\\\\\Delta ADC=60\text{ square cm}\end{gathered}

ΔABD+ΔADC=ΔABC

3

ΔADC

+ΔADC=ΔABC

3

4ΔADC

=80

ΔADC=60 square cm

Answer 2

Explanation:

the qualily and quantity, of energy we

put forth 2 intro getting greatly impaired the result it no more than