Question

Area of a right angle triangle is 54 cm2

. If base is 12 cm long then its height is

a) 18 cm
b) 9 cm
c ) 36 cm
d) 54 cm
please give my answer then I mark as Brainliest Answer​

Answer 1

Answer:Area of right angled triangle

= 1/2 × base × height = 54

Taking base as 12 cm we get

1/2 × 12 × height = 54

=> 6 × height = 54

=> height = 54/6

=> height = 9 cm

So we have its two sides as 12cm and 9cm

Now we will have to find the hypotenuse to find the perimeter of the figure.

=> Hypotenuse² = base² + height²

=> Hypotenuse² = 12² + 9²

=> Hypotenuse² = 144 + 81

=> Hypotenuse² = 225

=> Hypotenuse = √225

=> Hypotenuse = 15 cm

So the perimeter = sum of all sides.

=> Perimeter = 12 + 9 + 15

=> Perimeter = 36 cm

Answer :- 36 cmArea of right angled triangle

= 1/2 × base × height = 54

Taking base as 12 cm we get

1/2 × 12 × height = 54

=> 6 × height = 54

=> height = 54/6

=> height = 9 cm

So we have its two sides as 12cm and 9cm

Now we will have to find the hypotenuse to find the perimeter of the figure.

=> Hypotenuse² = base² + height²

=> Hypotenuse² = 12² + 9²

=> Hypotenuse² = 144 + 81

=> Hypotenuse² = 225

=> Hypotenuse = √225

=> Hypotenuse = 15 cm

So the perimeter = sum of all sides.

=> Perimeter = 12 + 9 + 15

=> Perimeter = 36 cm

Answer :- 36 cm

Step-by-step explanation:

Answer 2

Answer:

18 cm is the answer

Step-by-step explanation:

mark me as brainlist