Question

Determine the total length of the given triangle.

• A. 350 cm
• B. 445 cm
• C. 520 cm
• D. 485 cm

Answer 1

The correct option is B 445 cm

$\text{To find the length of the boundary of}$ $\text{the triangle, we have to add the lengths}$ $\text{of all the three sides.}$

$\text{Let's make the units same for all the}$ $\text{sides.}$

$\text{As we know,}$
$\text{1 m = 100 cm}$


$\text{Length of side AB}$ $\text{= 1.55 m}$

$\text{So, 1.55 m}=1.55\times 1\text{m}$
$=1.55\times 100\text{cm}$
$=155\text{cm}$

$\text{Length of side BC}$ $\text{= 1.35 m}$

$\text{So, 1.35 m}=1.35\times 1\text{m}$
$=1.35\times 100\text{cm}$
$=135\text{cm}$

$\text{Length of side AC}$ $\text{= 155 cm}$

$\text{Now, let's add all the three sides.}$

$⟹$ $\text{155 + 135 + 155 = 445 cm}$


$\text{Thus, the total length of the triangle}$ $\text{is 445 cm.}$