Question

b) Write the ratio of areas of triangle ABD and triangle ADC

c) If area of triangle ABD is 21 cm2 , then find area of triangle ADC​

Answer 1

Step-by-step explanation:

including results for write the ratio of areas of triangle ABD and ADC

Answer 2

Step-by-step explanation:

The value of DC is 6 cm.

Solution:

According to the question,

Given Data:

Area of triangle ABD is 10 square cm and area of triangle ADC is 12 sq.cm

To Find:

(a) Find BD: DC

(b) If BD=5cm,

Step-by-step Explanation:

Step 1:

Area of triangle ADB =h \times \frac{b_{1}}{2}=h×

2

b

1

10 =h \times \frac{5}{2}=h×

2

5

To find the value of h:

Step 2:

h=4 cm

The value of h is 4 cm

Area of ADC =h \times \frac{b_{2}}{2}=h×

2

b

2

Step 3:

12= 4 \times \frac{b_{2}}{2}4×

2

b

2

Step 4:

\frac{C D}{b_{2}}=\frac{24}{4}=6 \mathrm{cm}

BD: DC=5:6

Step 5:

Result:

The value of DC is 6 cm