Question 1107478
perimeter will remain in the 3:4 ratio, so the perimeter of 84 for larger, 3:4=x:84
x=63m for smaller

For a triangle, the area is (1/2)bh
both b and h will each be (1/5) of the larger triangle
Their product is (1/25), so the area will be 1/25 of the area or 160/25 or 6.4 cm^2.