Question

6. An umbrella is made by stitching 10 triangular pieces of cloth of two different colours (see fig. 12.16), each piece measuring 20 cm, 50 cm and 50 cm. How much cloth of each colour is required for the umbrella?​

Answer 1

Answer:

The study of living organisms, divided into many specialized fields that cover their morphology, physiology, anatomy, behaviour, origin, and distribution.

Answer 2

Answer:

1000$\sqrt{6}$ cm^2

Step-by-step explanation:

There are 10 triangles, out of which 5 of black and 5 of grey color. Now,

Area of of each cloth=5× area of 1 triangle

Area of triangle=  

s(s−a)(s−b)(s−c)

​

,s=  

2

a+b+c

​

=  

2

50+20+50

​

 

s=60㎝

∴ar△=  

60(60−50)(60−20)(60−50)

​

=  

60×10×40×10

​

 

=  

6×10×10×4×10×10

​

=2×10×10  

6

​

=200  

6

​

㎠

Area of each cloth required=(5×200  

6

​

)㎠=1000  

6

​

㎠