Question

LaShaundra is buying fence for two triangular sections of her garden.

Answer 1

Answer:

80 ft

Step-by-step explanation:

We are given two similar triangles ABC and DFG

When two triangles are similar then the ratio of their corresponding sides are equal.

$\frac{AB}{DF}=\frac{BC}{FG}=\frac{AC}{DG}$

AB=4 ft

BC=5ft

AC=7 ft

DF=20 ft

FG=25 ft

$\frac{4}{20}=\frac{5}{25}=\frac{7}{DG}$

$\frac{4}{20}=\frac{7}{DG}$

$DG=\frac{7\times 20}{4}=35 ft$

Perimeter of DFG=DF+FG+DG=20+25+35=80 ft

Hence, she would need fence for triangle DFG=80 ft

Answer 2

ABC to DFG so SF = 20/4 = 5 
so DG = 7 x 5 = 35 ft

P of DFG = 20+25+35 = 80 ft

answer
80 ft