Question

(9) In a right angled triangle, the length of
the hypotenuse is 29 cm and one of the
sides forming right angle is 21 cm, then
the semiperimeter of the triangle is
cm.


explain step by step ​

Answer 1

Answer:

√(29)²-(21)²= another side

another side is equal to 20

the perimeter of the triangle is equal to 29 + 21 + 20 is equal to 70

semi perimeter is equal to 70/2

= 35

Step-by-step explanation:

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Answer 2

Answer:

Semiperimeter = 35cm

Step-by-step explanation:

Let the other leg be x cm

(By Pythagoras theorem)

29²=21²+x²

841=441+x²

x²=841-441

x²= 400

x=20

Therefore, the other leg is 20cm.

Semiperimeter = sum of three sides/2

= (29+21+20)/2

= 70/2

= 35 cmcm

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