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Gnom [1K]
3 years ago
5

A right triangle has an area of 24 ft². The dimensions of the triangle are increased by a scale factor of 6. What is the area of

the new triangle?
A. 48 ft²

B. 72 ft²

C. 144 ft²

D. 60 ft²
Mathematics
2 answers:
finlep [7]3 years ago
6 0

Answer: The area of the new triangle is 864\ ft^2

Step-by-step explanation:

For this exercise it is important to remember that, when you increase the dimensions of a triangle by a scale factor of k ,he area of the triangle is increased by a factor k^2.

In this case, you know that the area of the right triangle is 24\ ft^2.  

Since the dimensions of the right triangle are increased by a scale factor of 6, then you must multiply the original area by a factor of 6^2.

Therefore, the area of the new triangle is:

A'=(24\ ft^2)(6^2)\\\\A'=(24\ ft^2)(36)\\\\A'=864\ ft^2

goldenfox [79]3 years ago
4 0

Answer:

Area of new triangle must be 864 ft^2

Step-by-step explanation:

Given:

Area of right angle triangle = 24 ft^2

Dimension of the triangle is increased by scale factor of 6.  

To Find:

Area of new triangle=?

Solution:

Lets say perpendicular side which is height of right angled triangle = a

And base of right angled triangle be represented by b  

Area of triangle =\frac{1}{2}base \times height

Area of triangle=\frac{1}{2}( a\times b )

substituting the given values,

=> \frac{1}{2} ( a \times b ) = 24

=> ab = 24 x 2 = 48  

=> ab = 48    -------(1)

Now given that Dimension of triangle is increased by scale factor of 6 means dimension of new triangle is equal to 6 times dimension of first triangle

=>perpendicular side which is Height of new right angled triangle  = 6 x a = 6a

And base of new right angled triangle = 6 x b = 6b

Area of new triangle =\frac{1}{2}base\times height= \frac{1}{2} (6a \times 6b )

Area of new triangle = 18ab

Substituting value of ab as 48 from eq (1) in above equation we get

Area of new triangle = 18 x 48 = 864

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