Question

PLEASE SLOVE 20 AND 21 SUMS.

Answer 1

Answer:

Step-by-step explanation:

For question 20 use this formula

Perimeter of triangle 1/ perimeter of triangle 2 = side of triangle 1/ side of triangle 2

Let side of triangle 2 be x.

25/15=9/x

X=9*15/25

x=27/5

x=5.4 cm

For question 21 use formula

Area of triangleABC/ Area of triangle DEF = BC^2/ EF^2

Let area of triangle DEF be x cm^2

54/x= 3×3 / 4×4

54/x=9/16

×=54*16/9

x=6*16=96cm^2

Hope it helps*_*