Question

Meena wants to make a cloth mask by joining two equal size triangular pieces of sides 5cm,8cm and 5cm.how much cloth has she required​

Answer 1

Answer:

ask Meena

Step-by-step explanation:

she knows the answer

Answer 2

Answer:

${\huge{\red{\underline{\underline{Question}}}}}$

Meena wants to make a cloth mask by joining two equal size triangular pieces of sides 5cm,8cm and 5cm.how much cloth has she required??

${\huge{\red{\underline{\underline{Answer}}}}}$

${\underline{\underline{Given}}}$

Three sides of a triangle i.e.

• 1st side=5cm
• 2nd side=8cm
• 3rd side=5cm

${\underline{\underline{To\ find:}}}$

Measure of cloth she required=Area of 2 triangle of sdes 5,8 and 5cm=????

${\underline{\underline{Solution}}}$

Here s=$\frac{sum\ of\ all\ sides}{2}$

=$\frac{5+8+5}{2}$

=$\frac{18}{2}$

=9

Area by herons formula=$\sqrt{s{(s-a)}^{2}{(s-b)}^{2}{(s-c)}^{2}}$

=$\sqrt{9{(9-5)}^{2}{(9-8)}^{2}{(9-5)}^{2}}$

=$\sqrt{9×16×1×16}$

=3×4×1×4

=${48cm}^{2}$

Area of cloth required =2×Area of triangle=2×48=${96cm}^{2}$