Question

Angle ABC is right angled at B.If AB=5cm And BC=12cm ,find its semi-perimeter .​

Answer 1

Answer:

AC= 13

AB= 5

BC= 12

Semi perimeter = 5+12+13/2

= 30/2

= 15

Step-by-step explanation:

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Answer 2

Given: ABC is right-angled at B and AB= 5CM AND BC= 12cm

To find: Semi-perimeter

Solution:

The formula for semi- perimeter is S= A+B+C/2

Here, the letters A, B and C are denoting the various sides of the right-angled triangle.

We have the measurement for the sides A and B so we will find the measurement of side C by using the Hypotenuse theorem which is $C^{2} = A^{2} +B^{2}$

$C^{2} =$25+144

= 169 = 13cm

Hence, the measurement of side C is 13cm.

Semi-perimeter= 5+12+13/2

                         = 30/2

                         = 15cm

The semi- perimeter is 15cm.