Question

Black and White coloured triangular sheets are used to make a toy as shown in figure find the total area of black and white colour sheet used for making the toy

Answer 1

area of one black sheet =s=6+6+4÷2=8
$\sqrt{8(8 - 6)(8 - 6)(8 - 4)}$
$\sqrt{128}$
3.31 of one black sheet
for 2 black sheet =2×3.31=6.62
similarly for one white sheet =3.31
for 2 white sheet =2×3.31=6.62

Answer 2

Answer:

$45.24 cm^2$

Step-by-step explanation:

Sides of white triangle

a = 6

b = 6

c = 4

Area of triangle = $A=\sqrt{s(s-a)(s-b)(s-c)}$

$s=\frac{a+b+c}{2}$

Substitute the values

$s=\frac{6+6+4}{2}$

$s=8$

$A=\sqrt{8(8-6)(8-6)(8-4)}$

$A=11.31$

Since the dimensions of all the triangles are equal

So, Area of 4 triangles = $11.31 \times 4 = 45.24 cm^2$

Hence the total area of black and white colour sheet used for making the toy is  $45.24 cm^2$