Question

the perimeter of the triangle is 42cm. if two of its sides are 16cm and 12cm find its third side

Answer 1

Answer:

Third side is 4 cm

as

perimeter of triangle is

ty triangle ABC = A+B+C

42. = 16+12+C

42 = 38+C

42-38 = C

C. = 4cm

Answer 2

Question:-

The perimeter of the triangle is 42cm. if two of its sides are 16cm and 12cm find its third side.

Given:-

• Perimeter of triangle is 42 cm.
• Measures of two sides are 16 cm and 12 cm.

To find :-

• The third side of triangle.

We know that the formula to find perimeter of triangle is

• a+b+c

Solution:-

Let the third side be x.

$16cm + 12cm + x = 42cm$

$28 \: cm + x = 42$

$x = 42 - 28cm$

$x = 14 \: cm$

Therefore the measure of third side is 14 cm.

$\huge{ \underline{ \underline{ \red{ \bf \: Verification}}}}$

Substituting the value of x.

$\bf \: 1 6 + 12 + 14 = 42 \: cm$

Hence proved that our answer is correct.

Step-by-step explanation:

Learn more formula related to perimeter:-

• Perimeter ofsquare=4×side
• Perimeter of rectangle = 2(length +breadth )
• Perimeter of triangle = sum of all sides
• Circumference of circle = 2πr