5th grade Maths
posted by Jay .
With help of the 10 equilateral triangles of side 3 cm, 8 rectangles of 4*2 cm and 4 square of 3*3 cm make 3 structures using all the figures. find the perimeter of all the triangles, squares, and rectangles??

3+3+3=9=1 triangle
4+4+2+2=12=1 rectangle
3+3+3+3=12=1 square
9x10=90 for 10 squares
8x12=96 for 8 rectangle
4x12=48 for 4 squares
90cm+96cm+48cm=234cm for total perimeter
perimeter of triangle=s^3=s+s+s
perimeter of square= l+l+w+w
perimeter of square=s^4=s+s+s+s
hope this helps. it should because its the right answer haha :)