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Misha Larkins [42]
1 year ago
15

A right angled triangle has sides of length 9cm, 12cm and 15cm. Calculate its area in square centimetres.

Mathematics
1 answer:
Dmitriy789 [7]1 year ago
5 0

The area of a right angled triangle with sides of length 9cm, 12cm and 15cm in square centimeters is 54 sq cm.

The formula to calculate the area of a right triangle is given by:

Area of Right Triangle, A = (½) × b × h square units

Where, “b” is the base (adjacent side) and “h” is the height (perpendicular side). Hence, the area of the right triangle is the product of base and height and then divide the product by 2.

We know that the hypotenuse is the longest side. So, the area of a right angled triangle will be half of the product of the remaining two sides.

Given sides of the triangle:

a=9cm

b=12cm

c=15cm

From this we know that the hypotenuse is c. Are of the triangle will be obtained by the other two sides.

∴Area = \frac{1}{2} x 9 x 12

= 54cm^{2}

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Answer:

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Step-by-step explanation:

(5a+\frac{1}{2} b)^{2}

1. First, write out the expression without the square

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2. Then use foil to multiply:

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3. That is your answer.

8 0
3 years ago
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Helga [31]

Answer:

A.

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Step-by-step explanation:

We’ll domain is the amount of x values,

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_______________________________

Domain:

Starts from -4 to 4

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I made the sign less than or equal to because the circle lines are solid.

Range:

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<em>Thus,</em>

<em>answer choices A. is correct</em>

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<em>Hope this helps :)</em>

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mel-nik [20]

Answer:

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The perimeter of the rectangle is also 30 cm.

Step-by-step explanation:

The perimeter of the triangle is 30 cm.

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Answer:

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Step-by-step explanation:

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