TRUEBOSS72
TRUEBOSS72 TRUEBOSS72
  • 18-08-2018
  • Mathematics
contestada

Please help me out!!
( i think the 1st one is 130r)
not sure?

Please help me out i think the 1st one is 130r not sure class=
Please help me out i think the 1st one is 130r not sure class=
Please help me out i think the 1st one is 130r not sure class=

Respuesta :

mkryukova19 mkryukova19
  • 18-08-2018

Perimeter of ABC = 30+40+60=130. Because for XYZ all sides r-times as long as corresponding sides of ABC, Perimeter of XYZ = 30r+40r+60r=130r.

Answer is B. 130r.

Area of triangle ABC =1/2 base*height. For XYZ all linear measurements is increased by r, so Area of triangle XYZ =1/2( base*r)*(height*r)=1/2base*height*r*r= =Area(ABC)*r*r = n*(r*r)

Answer is C. n(r*r).

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