Question

50 green coloured paper triangles of sides 3inch,4inch,5inch were made and 50 red coloured paper triangles of sides 5inch,7inch,8inch were made.
1)find the total red coloured paper used
a)150sq.inch
b)300sq.inch
c)400sq.inch
d)450sq.inch

2)find the total green coloured paper​

Answer 1

Step-by-step explanation:

total green coloured paper used=50×area of triangle of sides 3 inch,4inch,5 inch

=50×(1/2×3×4)=50×6=300inch²

total red colored paper used =50×area of triangles of sides 5inch,7inch,8inch

=50×square root[s(s-a)(s-b)(s-c)]

s=5+7+8/2=10

50×[10(5)(3)(2)]½=50×(300)½=50×10×1.732=5×173.2=866inch²