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Ainat [17]
2 years ago
9

Find the area of the figure below formed from a triangle and from a rectangle in square millimeters

Mathematics
2 answers:
777dan777 [17]2 years ago
7 0

Answer:

Area of given figure is 216 mm².

Step-by-step explanation:

Area of the given figure = Area of triangle + Area of Rectangle

Area of triangle whose sides are known is determined by the formula:

Area = \sqrt{s(s-a) (s-b)(s-c)}

where s is the semi-perimeter of the triangle. i.e.

s = (a + b + c) ÷ 2

⇒ s = ( 12 + 16 + 20) ÷ 2 = 24 mm

Then Area = \sqrt{24(24-12) (24-16)(24-20)}

⇒ Area = \sqrt{24\times12\times8\times4}

⇒ Area = 96 mm²

Area of Rectangle = length × width

Area = 6 × 20 = 120 mm²

∴ Total Area = 96 mm + 120 mm = 216 mm²

Thus, Area of given figure is 216 mm².

yaroslaw [1]2 years ago
3 0

To find the area of the triangle, you multiply the two sides together, and divide it by two. To find the area of the rectangle, just multiply the two sides given. Add the two products together, and you get your answer!

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¿CUAL ES EL PERIMETRO DE UN RECTANGULO SABIENDO QUE SU ANCHO ES 3/4 DEL LARGO Y BEL LARGO MIDE 2,55M?
m_a_m_a [10]

Answer:

Perímetro = 8.925 metros

Step-by-step explanation:

La formula del perímetro de un rectángulo es:

perímetro = 2(ancho + largo)

en este caso:

p = 2(a+b)

a = 3b/4

b = 2.55m

a = ancho del rectángulo

b = largo del rectángulo

entonces:

sustituyendo el valor de la segunda ecuación

p = 2((3b/4)+b)

p = 2((3b/4)+(4b/4))

p = 2(7b/4)

p = 14b/4

p = 7b/2

p = 7*2.55/2

p = 8.925m

3 0
3 years ago
40% of x is 35. What is the equation to find x
Dima020 [189]

Answer:

.40 x = 35  equation

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Step-by-step explanation:

Of means multiply and is means equals

40% * x = 35

Change percent to decimal form

.40 x = 35

Divide each side by .40

.40x/.40 = 35/.40

x = 35/.40

x =87.5

4 0
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