Question

how do i solve this?

Answer 1

Answer:

$5.4 cm^{2}$

Step-by-step explanation:

The area of triangle is given by 0.5bh where b is the base while h is height. Therefore, A=0.5bh

For triangle ABC

15=0.5*5*h

H=6cm

Using the concept of similarity and enlargement

$\frac {B_a}{B_d}=\frac {H_a}{H_d}$

Where B and H represent base and height respectively. Subscripts a and d represent triangle ABC and DEF.

Therefore

$\frac {5}{3}=\frac {6}{H_d}\\H_d=3.6\ cm$

Area will be

$A=0.5*3*3.6=5.4\cm^{2}$